informal

adjective

in·​for·​mal (ˌ)in-ˈfȯr-məl 

1

: marked by the absence of formality or ceremony

an informal meeting

2

: characteristic of or appropriate to ordinary, casual, or familiar use

informal clothes

informality

(ˌ)in-(ˌ)fȯr-ˈma-lə-tē 

-fər-

noun

informally

(ˌ)in-ˈfȯr-mə-lē 

adverb

Synonyms of informal

• unconventional

Examples of informal in a Sentence

We had an informal meeting over lunch.

He has an informal manner that puts people at ease.

He spoke to them in informal Spanish.

The term is common in informal contexts.

He took an informal poll among his coworkers.

Recent Examples on the Web

In Hong Kong, for instance, most people speak Cantonese, an informal and colloquial language that has its own version of a gender-neutral pronoun – lessening the demand for a new character, said Wan, of rights group Gender Empowerment. —Jessie Yeung, CNN Money, 26 Dec. 2025

An informal memorial will take place at a Kennesaw park on Tuesday, according to WAGA. —Abigail Adams, PEOPLE, 23 Dec. 2025

At home, Isata, Braimah, Sheku, Konya, now 25, Jeneba, now 23, Aminata, now 20, and Mariatu, now 16, also formed their own informal music school. —Jon Wertheim, CBS News, 22 Dec. 2025

Kohlhagen champions hands-on science and critical thinking in both formal and informal education contexts. —IEEE Spectrum, 22 Dec. 2025

Word History

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for informal

• abnormal
• conformal
• lognormal
• nonformal
• subnormal
• formal
• formyl
• orthonormal
• paranormal
• supernormal

Kids Definition

informal

adjective

in·​for·​mal (ˈ)in-ˈfȯr-məl 

1

: not formal

an informal party

2

: suited for ordinary or everyday use

informal clothes

informality

ˌin-(ˌ)fȯr-ˈmal-ət-ē 

-fər-

noun

informally

(ˈ)in-ˈfȯr-mə-lē 

adverb

Legal Definition

informal

adjective

in·​for·​mal

: marked by the absence of required forms or procedures or by the relaxation of prescribed rules

an informal hearing