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

• heterodox
• irregular
• unceremonious
• unconventional
• unorthodox

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

This should include allowing parallel negotiations and informal processes to facilitate progress on outstanding issues. —Alexandra Phelan, STAT, 27 May 2024

Evins wanted to create an informal, welcoming place where people could gather for a meal or make a pit stop. —Carolanne Griffith Roberts, Southern Living, 22 May 2024

Word History

First Known Use

15th century, in the meaning defined at sense 1

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