Informal Meaning

/ɪnˈfɔː.m(ə)l/
B1

Definition, CEFR level B1, pronunciation, examples, and quiz.

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adjNot formal or ceremonious.

adjNot in accord with the usual regulations.

It was only an informal party.
It's quite an informal meeting.
Informal diction is always full of mystery and surrealism.
Synonyms:
Antonyms:
CEFR Practice Quiz
The company dress code is ____, so employees can wear jeans and T-shirts.
CEFR Practice Quiz (Alternate)
The party was very ____, so everyone just wore comfortable jeans and simple T-shirts.

Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in-bor. Middle English in- English in- English formal English informal From in- + formal.

"One saint's day in mid-term a certain newly appointed suffragan-bishop came to the school chapel, and there preached on “The Inner Life.” He at once secured attention by his informal method, and when presently the coughing of Jarvis […] interrupted the sermon, he altogether captivated his audience with a remark about cough lozenges being cheap and easily procurable." — 1918, W[illiam] B[abington] Maxwell, chapter III, in The Mirror and the Lamp, Indianapolis, Ind.: The Bobbs-Merrill Company, →OCLC:
"Students and faculty members lunch at the cafeteria and naturally communicate freely with one another in a relaxed and informal setting." — 2019, Li Huang, James Lambert, “Another Arrow for the Quiver: A New Methodology for Multilingual Researchers”, in Journal of Multilingual and Multicultural Development, →DOI, page 4:
"Participants emphasized the importance of their social network in facilitating their strength training experiences. Family members served as informal coaches who introduced the participants to basic exercises. This role, where family members model healthy behaviors, has been identified as being important to help supporting PA participation among autistic individuals in prior work (Ku et al., 2020; Shields et al., 2012)." — 2025 August 20, Ashlyn Barry, Justin A. Haegele, Daniel Schaefer, Kristen A. Pickett, Luis Columna, “Autistic Young Adults’ Experiences and Recommendations for Strength Training”, in Journal of Autism and Developmental Disorders, →DOI:
"When I returned to the movie Ghilli, a Kollywood classic (Kollywood being the informal name for Tamil cinema) that I loved as a kid, I couldn’t help but question why the story continues romantically, without question, after the heroine is slapped by the supposed love of her life." — 2025 August 14, Saranka Maheswaran, “Cheer up, Ice Cube, your War of the Worlds movie may be really bad, but it’s not worthless”, in The Guardian:

Explore More B1 Vocabulary Words

CEFR Practice Quiz
The company dress code is ____, so employees can wear jeans and T-shirts.
CEFR Practice Quiz (Alternate)
The party was very ____, so everyone just wore comfortable jeans and simple T-shirts.

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