high light (highlight)

Quick answer

Write highlight (one word) when you mean "to emphasize" or "a notable item." Writing it as two words-high light-is almost always wrong unless you literally mean a light that is high.

Core explanation

Highlight is a single lexical item in modern English. As a verb, it means to draw attention to something: "She highlighted the important paragraph." As a noun, it names the most notable part: "The highlight of the talk was the case study."

Split forms like high light separate the parts and suggest two independent words, which changes the meaning or creates a typo. Rarely, the literal two-word reading fits: "a light that hangs high above the stage." In practice, when you mean "emphasize" or "standout item," stick with the closed form.

Hyphenation and spacing

Do not use high-light for the meaning "emphasize." Hyphenation would be unusual and dated. Likewise, avoid spacing (high light) because it breaks a single lexical unit into two words and invites errors in verb forms and morphology.

Correct inflections: highlighted, highlighting. Incorrect: high lighted, high lighting.

Why writers make this mistake

Three common causes:

• Sound-based guessing: you hear "high" + "light" and assume two words.
• Typing fast or copying speech without checking spelling.
• Overcorrection when unsure whether a compound should be closed, hyphenated, or spaced.

Real usage: work, school, casual

Seeing natural examples helps you internalize the closed form.

• Work: I highlighted the metrics that matter for the quarterly review.
• School: Highlight the thesis statement in each source you annotate.
• Casual: She always highlights the best lines in a movie.

Wrong vs right examples you can copy

Copy these pairs into your editor or notes to train your eye.

• Wrong: Please high light the key figures.
  Right: Please highlight the key figures.
• Wrong: The highlight of the event was a high light at the back.
  Right: The highlight of the event was a light at the back. (or: "a light hung high at the back.")
• Wrong: She high-lighted the paragraph.
  Right: She highlighted the paragraph.
• Wrong: I'll be high lighting that section tomorrow.
  Right: I'll be highlighting that section tomorrow.
• Wrong: The project's high light is the new feature.
  Right: The project's highlight is the new feature.
• Wrong: He said the problem was high lighted incorrectly.
  Right: He said the problem was highlighted incorrectly.

How to fix your own sentence (rewrite help)

Fixing the error often only needs removing the space, but check tone and flow after the edit. When a simple fix sounds awkward, rewrite for clarity.

• Step 1: Identify whether you mean "emphasize" or "literal light higher up."
• Step 2: Use highlight (or rephrase with emphasize/underscore if more formal).
• Step 3: Read the full sentence aloud and adjust for rhythm.

Rewrite templates:

• Original: This chart should be high lighted for the board.
  Rewrite: This chart should be highlighted for the board.
• Original: Is that high light available now?
  Rewrite: Is that highlight available now? (Or: "Is that the highlight available now?")
• Original: It was a high lighted moment in class.
  Rewrite: It was a highlighted moment in class. (Or: "It was a standout moment in class.")

A simple memory trick

Picture a single highlighter stroke: one continuous mark. Think "one word, one mark." Write highlight five times slowly, then use a search-and-replace in your documents to fix past mistakes in bulk.

Similar mistakes to watch for

Once you split one compound, similar errors often spread. Scan for these patterns:

• Other split words that should be closed (e.g., backbone vs back bone).
• Unnecessary hyphens where the closed form is standard.
• Incorrect verb forms created by adding -ed or -ing to a separated pair.
• Noun/verb confusion when spacing changes the part of speech.

FAQ

Is "high light" ever correct?

Only when the literal meaning applies: two separate words where "high" modifies "light" (a light that is high). In practice, that phrasing is rare; most uses require highlight.

Can I write "high-light" with a hyphen?

No. For the sense "to emphasize" or "a standout item," the closed form highlight is standard. A hyphen looks dated and can confuse readers.

How do I fix "high lighted" across a document?

Use Find/Replace to change "high light" → "highlight," then correct inflected forms: "high lighted" → "highlighted," "high lighting" → "highlighting." If your editor supports regex, search for \bhigh\s+light\b.

Should I use "highlight" or "emphasize" in formal writing?

Highlight is neutral and widely accepted in formal contexts. Use emphasize or underscore when you want a stronger, more formal tone.

Why do I keep typing "high light" as two words?

It's often a habit from hearing the phrase or uncertainty about compound forms. Set a keyboard shortcut, run a replace across your files, and deliberately write the correct form several times to retrain muscle memory.

Quick way to fix one sentence now

Paste the sentence into your editor, remove the space so it reads highlight, then read the sentence aloud. If it still sounds off, try emphasize or a short rewrite for clarity.