Synonyms of unofficial

unofficial

adjective

as in unauthorized

Synonyms & Similar Words

• unauthorized
• informal
• unorthodox
• unconventional
• unceremonious
• heterodox
• irregular
• casual
• free and easy
• easygoing
• familiar
• offhand
• lax
• relaxed
• ultracasual
• loose

Antonyms & Near Antonyms

• regular
• formal
• conventional
• ceremonial
• routine
• proper
• orthodox
• correct
• ceremonious
• rigid
• decorous
• stiff
• restrained
• uptight
• inhibited
• stuffy
• constrained

Example Sentences

Recent Examples of unofficial

What started out as a thrifty practice has become an unofficial commandment of Southern kitchens—don't waste one drop of tasty bacon grease. —Josh Miller, Southern Living, 18 Apr. 2025

The other current coed event is the unofficial Grant Thornton Invitational, which is co-sanctioned by the LPGA Tour and the PGA Tour. —Matt Robison, MSNBC Newsweek, 16 Apr. 2025

So for the time being, Amelia will be his unofficial assistant. —Nina Metz, Chicago Tribune, 16 Apr. 2025

Xie Feng made unsuccessful attempts before the election to reach Trump’s billionaire ally Elon Musk, said a U.S. scholar who recently visited China for unofficial exchanges that Beijing has historically used to communicate with Washington policymakers. —Beijing and Washington Bureaus, USA Today, 14 Apr. 2025