verb (used with object)

to make or cause to seem smaller, less, less important, etc.; lessen; reduce.
Architecture. to give (a column) a form tapering inward from bottom to top.
Music. to make (an interval) smaller by a chromatic half step than the corresponding perfect or minor interval.
to detract from the authority, honor, stature, or reputation of; disparage.

verb (used without object)

to lessen; decrease.

Origin of diminish

1400–50; late Middle English; blend of diminuen (< Anglo-French diminuer < Medieval Latin dīminuere for Latin dēminuere to make smaller) and minishen minish
Related formsdi·min·ish·a·ble, adjectivedi·min·ish·ment, nounnon·di·min·ish·ing, adjectivepre·di·min·ish, verb (used with object)pre·di·min·ish·ment, nounun·di·min·ish·a·ble, adjectiveun·di·min·ish·a·ble·ness, nounun·di·min·ish·a·bly, adverbun·di·min·ished, adjectiveun·di·min·ish·ing, adjective

Synonym study

5. See decrease.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for undiminished

Contemporary Examples of undiminished

Historical Examples of undiminished

  • "He has done so," replied the countess, with undiminished stateliness.

    Fairy Fingers

    Anna Cora Mowatt Ritchie

  • From time to time it gave forth its tributaries, yet seemingly was undiminished.

    Child and Country

    Will Levington Comfort

  • She wanted him to see that her love was undiminished, and that he could count on it.

    The Explorer

    W. Somerset Maugham

  • The shouting from the Barracouta kept on with undiminished vigor.

    Jim Spurling, Fisherman

    Albert Walter Tolman

  • Heliet answered her gently, gravely, but held her own with undiminished calmness.

    A Forgotten Hero

    Emily Sarah Holt

British Dictionary definitions for undiminished



not reduced or lessened



to make or become smaller, fewer, or less
(tr) architect to cause (a column, etc) to taper
(tr) music to decrease (a minor or perfect interval) by a semitone
to belittle or be belittled; reduce in authority, status, etc; depreciate
Derived Formsdiminishable, adjectivediminishingly, adverbdiminishment, noun

Word Origin for diminish

C15: blend of diminuen to lessen (from Latin dēminuere to make smaller, from minuere to reduce) + archaic minish to lessen
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 undiminished

1580s, from un- (1) "not" + past participle of diminish.



early 15c., from merger of two obsolete verbs, diminue and minish. Diminue is from Old French diminuer "make small," from Latin diminuere "break into small pieces," variant of deminuere "lessen, diminish," from de- "completely" + minuere "make small" (see minus).

Minish is from Old French menuisier, from Latin minuere. Related: Diminished; diminishes; diminishing.

Online Etymology Dictionary, © 2010 Douglas Harper