[ opt ]
See synonyms for opt on Thesaurus.com
verb (used without object)
  1. to make a choice; choose (usually followed by for).

Verb Phrases
  1. opt in, to decide to make use of or take part in something: To receive automatic updates, opt in under the email notification section.

  2. opt out, to decide to withdraw from or not take part in something: You can opt out of the pension plan, but you lose the employer and government contribution.

Origin of opt

First recorded in 1875–80; from French opter “to choose, divide,” from Latin optāre “to wish for, desire, pray for, choose, select”

Other words for opt

Other words from opt

  • un·opt·ed, adjective

Other definitions for opt. (2 of 2)


  1. optative.

  2. optical.

  1. optician.

  2. optics.

  3. optional.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use opt in a sentence

British Dictionary definitions for opt


/ (ɒpt) /

  1. (when intr, foll by for) to show preference (for) or choose (to do something): See also opt in See also opt out

Origin of opt

C19: from French opter, from Latin optāre to choose

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012