Poster vs Sign

When to use each in English, with meaning, register, and examples.

Poster

Top 1,000 (very common)A2noun

Sign

Top 1,000 (very common)A2noun
 PosterSign
Pronunciation🇬🇧 /["/ˈpəʊstə(r)/"]/🇺🇸 /["/ˈpəʊstər/"]/🇬🇧 /["/saɪn/"]/🇺🇸 /["/saɪn/"]/
MeaningA large piece of paper with pictures or information on it.A symbol or action that shows something or gives information.
ExampleShe hung a colorful poster on the wall to brighten up the room.Please follow the sign to reach the train station.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelA2A2
Part of speechnounnoun
Collocationscampaign, circus, election, display, hang, hang up, appear, go up, hang, campaign, board, presentation, on a/​the poster, poster for, poster of, campaign, circus, election, display, hang, hang up, appear, go up, hang, campaign, board, presentation, on a/​the poster, poster for, poster ofclassic, clear, definite, bear, have, betray, appear, come, indicate something, at a/​the sign, sign from, sign of, sign of life, a sign of the times, a sign of things to come, flashing, illuminated, neon, erect, hang, hang out, read something, announce something, proclaim something, sign for, sign to, rude, peace, thumbs-up, give (somebody), make, communicate through, language, system, sign for, make the sign of the cross, dollar, euro, pound, draw, use, mean something, sign for, birth, star, astrological, be born under, sign of, the signs of the Zodiac
Antonymsremover, dismantlerignore, disregard
Common mistakesConfused with 'flyer' — a poster is usually larger., Using 'posters' incorrectly as a verb., Mispronouncing it as 'poaster'.Confused with 'sine' in mathematical contexts., Using 'sign' as a verb incorrectly, e.g., 'I will sign that paper' without indicating what or who to sign., Misusing 'sign' for 'symbol' when differentiating context.
Usage notesUsed in everyday conversations and writing. Common in school or promotional contexts, but less so in formal writing.Used in various contexts like directing people, indicating information, or marking something. More formal in legal contexts, and informal in everyday signage.

Frequently asked questions: Poster vs Sign

What's the difference between Poster and Sign?

Poster: A large piece of paper with pictures or information on it. Sign: A symbol or action that shows something or gives information.

Are Poster and Sign the same CEFR level?

Poster: A2, Sign: A2 on the CEFR scale.

Can I use Poster and Sign interchangeably?

Not always. Poster and Sign are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

Related comparisons