Antonyms for informal

Grammar : Adj

Spell : in-fawr-muhl

Phonetic Transcription : ɪnˈfɔr məl

Definition of informal

Origin : mid-15c., "lacking form; not in accordance with the rules of formal logic," from in- (1) "not, opposite of" + formal. Meaning "irregular, unofficial" is from c.1600. Sense of "done without ceremony" is from 1828. Related: Informally.

adj casual, simple

Example sentences :

"Quite an informal affair," she said, in announcing her intention.
Extract from : « The Portygee » by Joseph Crosby Lincoln

Now and then he appeared at some professor's informal reception.
Extract from : « Under Western Eyes » by Joseph Conrad

Such an invitation is acknowledged in kind—by an informal note.
Extract from : « How to Write Letters (Formerly The Book of Letters) » by Mary Owens Crowther

I tell him I have "informal" news from the French but dare not take action on that.
Extract from : « Gallipoli Diary, Volume 2 » by Ian Hamilton

In Bengali this word has come to mean an informal uninvited gathering.
Extract from : « My Reminiscences » by Rabindranath Tagore

If that is an informal note, the acceptance or regret is sent in the same style.
Extract from : « The Etiquette of To-day » by Edith B. Ordway

Breakfasts may be homelike, informal affairs, or quite ceremonious.
Extract from : « The Etiquette of To-day » by Edith B. Ordway

And, friend, you don't get informal with a clansman when he's on guard.
Extract from : « The Best Made Plans » by Everett B. Cole

It was a bright, amusing letter, as informal as her own had been stiff.
Extract from : « Elsie Marley, Honey » by Joslyn Gray

After the salutatory phrase at the beginning of a letter, when informal.
Extract from : « Punctuation » by Frederick W. Hamilton

Synonyms for informal

Based on : Thesaurus.com - Gutenberg.org - Dictionary.com - Random House Unabridged Dictionary, © Random House, Inc. 2019