verb (used with object)

to state with assurance, confidence, or force; state strongly or positively; affirm; aver: He asserted his innocence of the crime.
to maintain or defend (claims, rights, etc.).
to state as having existence; affirm; postulate: to assert a first cause as necessary.


    assert oneself, to insist on one's rights, declare one's views forcefully, etc.: The candidate finally asserted himself about property taxes.

Origin of assert

1595–1605; < Latin assertus joined to, defended, claimed (past participle of asserere), equivalent to as- as- + ser- (see series) + -tus past participle suffix
Related formsas·sert·er, as·ser·tor, nounas·sert·i·ble, adjectivemis·as·sert, verb (used with object)o·ver·as·sert, verb (used with object)pre·as·sert, verb (used with object)re·as·sert, verb (used with object)

Synonyms for assert

Synonym study

1. See declare. 2. See maintain.

Antonyms for assert

1. deny. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for re-assert

Contemporary Examples of re-assert

Historical Examples of re-assert

  • The things of the mind on which all nations have co-operated in the past will re-assert their sway.

  • On p. 155 the word "reassert" has been changed from "re-assert" to match the spelling elsewhere in the book.

  • I am glad here to re-assert opinions which it has grieved me to be suspected of having changed.

  • But the principle for which we contended is bound to re-assert itself, though it may be at another time and in another form.

  • For this abandonment of any attempt to re-assert the royal authority he has been generally blamed.

    History of Holland

    George Edmundson

British Dictionary definitions for re-assert


verb (tr)

to insist upon (rights, claims, etc)
(may take a clause as object) to state to be true; declare categorically
to put (oneself) forward in an insistent manner
Derived Formsasserter or assertor, nounassertible, adjective

Word Origin for assert

C17: from Latin asserere to join to oneself, from serere to join
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

Word Origin and History for re-assert

also also reassert, 1660s, from re- + assert. Related: Reasserted; reasserting; reassertion.



c.1600, "declare," from Latin assertus, past participle of asserere "claim, maintain, affirm" (see assertion). Related: Asserted; asserting. To assert oneself "stand up for one's rights" is recorded from 1879.

Online Etymology Dictionary, © 2010 Douglas Harper