meta data (metadata)

Short answer: write metadata (one word). "Meta data" with a space is almost always wrong in modern English.

Quick answer

Use metadata as a single word. Avoid the spaced form "meta data" and use "meta-data" only if a specific house style requires a hyphen.

metadata = additional information about data (timestamps, tags, author, file type).
Most dictionaries and major style guides use the closed form: metadata.
For nontechnical readers, define it once: metadata (information like date, author, tags).

Core explanation: why one word

The prefix meta- (meaning "about" or "beyond") commonly fuses with nouns as usage becomes standard. Over time meta-data → metadata; the closed form is now established in both technical and general usage.

Writing "meta data" looks like a spacing error and adds unnecessary visual noise without changing meaning.

History: spellings evolved from two words to hyphenated to closed form.
Authoritative sources list metadata as a single word.
Treat metadata as a noun ("collect the metadata") or a modifier ("a metadata field").

Wrong: The photographer sent the meta data in a separate file.
Right: The photographer included the metadata in a separate file.

Spacing and hyphenation: when variants appear

Default: metadata (one word). Hyphenation (meta-data) shows up only in older texts or rare editorial choices. The spaced form (meta data) is not standard and should be corrected.

If your organization mandates a different form, follow that house style-but otherwise use metadata consistently.

Default: metadata (one word).
Hyphen: meta-data - acceptable only if required by a specific style guide.
Space: meta data - avoid in formal, technical, or academic writing.

Wrong: Please include the meta-data for each entry (older manual).
Right: Please include the metadata for each entry.
Note: Use meta-data only when a publisher or house style explicitly asks for it.

Grammar: noun vs modifier

Metadata works both as a noun ("Upload the metadata") and as an attributive modifier ("a metadata field"). Keep phrasing consistent: use "metadata fields" or "fields of metadata" - don't mix forms like "meta data fields".

As noun: "Collect the metadata."
As modifier: "a metadata schema" (no space).
Maintain parallel structure: "metadata fields" and "metadata values."

Wrong: We need better meta data management across our systems.
Right: We need better metadata management across our systems.
Wrong: Add meta data fields for date and author.
Right: Add metadata fields for date and author.

Real usage and tone: work, school, casual

Match phrasing to the audience. Be concise at work, define once in academic writing, and add a brief explainer in casual messages when recipients may not know the term.

Work: Concise and precise - "Check the file's metadata for the timestamp."
School: Define then use - "Metadata (information such as date and method) was recorded for each sample."
Casual: Add a short clarifier - "Send the metadata (date and location) if you can."

Work - Wrong: Attach the meta data before the upload.
Right: Attach the metadata before the upload.
Work - Wrong: Export the meta data into a CSV and send it.
Right: Export the metadata into a CSV and send it.
Work - Wrong: The backup missed some meta data during transfer.
Right: The backup missed some metadata during transfer.
School - Wrong: The meta data for each interview includes location.
Right: The metadata for each interview includes the location.
School - Wrong: When writing your paper, include meta data for your datasets.
Right: When writing your paper, include metadata for your datasets.
School - Wrong: Put meta data in the appendix.
Right: Put the metadata in the appendix (or: include a metadata table in the appendix).
Casual - Wrong: Hey - can you add the meta data to that photo?
Right: Hey - can you add the metadata to that photo (date and place)?
Casual - Wrong: I lost the meta data; photos don't show where they were taken.
Right: I lost the metadata; the photos don't show where they were taken.
Casual - Wrong: Share the meta data with the group chat.
Right: Share the metadata with the group chat (e.g., date, device).

Try your own sentence

Test the whole sentence rather than the phrase in isolation - context usually clarifies the right form.

Examples: concentrated wrong/right pairs to copy

Copy the "Right" lines into messages, reports, or assignments. Use these as search-and-replace patterns when editing documents.

Wrong: Please check meta data fields for inconsistencies.
Right: Please check metadata fields for inconsistencies.
Wrong: Add meta data to each record so search works.
Right: Add metadata to each record so search works.
Wrong: Did you see the meta data attached to the doc?
Right: Did you see the metadata attached to the document?
Wrong: We need meta data standards across teams.
Right: We need metadata standards across teams.
Wrong: The meta data shows the sample date and time.
Right: The metadata shows the sample date and time.
Wrong: Save the meta data with the export.
Right: Save the metadata with the export.
Wrong: The app strips meta data when compressing images.
Right: The app strips metadata when compressing images.
Wrong: Update the meta data schema before release.
Right: Update the metadata schema before release.
Wrong: Put the meta data in a separate file for reviewers.
Right: Put the metadata in a separate file for reviewers.
Wrong: I can't find the meta data - did you remove it?
Right: I can't find the metadata - did you remove it?
Wrong: Merge all meta data columns before analysis.
Right: Merge all metadata columns before analysis.
Wrong: The meta data was malformed in the CSV.
Right: The metadata was malformed in the CSV.

How to fix your sentence (fast rewrites and tips)

Quick routine: (1) Replace "meta data" with "metadata". (2) If readers are unfamiliar, add a parenthetical clarifier on first use. (3) Re-scan for modifier order and agreement.

Step 1: Search the document for "meta data" (two words) and replace with "metadata".
Step 2: When helpful, add a short explainer the first time: metadata (e.g., date, author, tags).
Step 3: Read the sentence aloud to check flow and parallel structure.

Rewrite:
Original: The meta data needs cleaning before analysis.
Rewrite: The metadata needs cleaning before analysis.
Rewrite:
Original: Add meta data (date, location) to each file.
Rewrite: Add metadata (date, location) to each file.
Rewrite:
Original: Put meta data in a separate folder for reviewers.
Rewrite: Put the metadata in a separate folder for reviewers.
Rewrite:
Original: The meta data's format changed after export.
Rewrite: The metadata format changed after export.

Memory trick and quick editing checklist

Memory trick: say the word as one unit - "met-a-data" - and picture the extra information packed inside a single word.

Checklist when reviewing a draft:

Find the two-word string "meta data" and replace with "metadata".
Check modifier placement: "metadata fields" vs "fields of metadata" - be consistent.
If readers are nontechnical, define metadata on first use.

Usage tip: Use your editor's search: find "meta data" → replace with "metadata", then skim each replacement to confirm surrounding wording still reads correctly.

Similar mistakes to watch for

Once you correct "meta data," look for other compounds that should be closed or hyphenated. When unsure, consult your dictionary or house style.

Common splits to close: "data base" → database; "home page" → homepage; "e mail" → email.
Some compounds still need hyphens (self-employed). When in doubt, check a style guide.

Wrong: I saved the file to the data base.
Right: I saved the file to the database.
Wrong: Please check your e mail for the invite.
Right: Please check your email for the invite.
Wrong: Update the home page copy.
Right: Update the homepage copy.

FAQ

Is "meta data" a correct spelling?

No. The correct modern form is "metadata" as a single word. "Meta data" with a space is viewed as incorrect in most contexts.

Should I ever write "meta-data" with a hyphen?

Hyphenation is rare. Use "meta-data" only if a specific house style or historical source requires it; otherwise use "metadata".

How do I explain metadata in a paper for nontechnical readers?

Define it the first time: for example, "metadata (information such as date, author, and file type)." After that, use "metadata" alone.

Does metadata act as a noun or an adjective?

Both. It can be a noun ("Upload the metadata") or an attributive modifier ("a metadata field"). Keep grammar parallel when listing or modifying items.

Can automated tools fix "meta data" for me?

Yes. Most grammar and style checkers flag "meta data" and suggest "metadata". Still run a search for the two-word string to catch any manual errors.

Still unsure about a sentence?

Run your sentence through a style tool or a grammar checker to catch spacing errors like "meta data." Use the examples here as copy-paste fixes for emails, reports, and assignments to keep your writing consistent.