[dee-puh n]

verb (used with or without object)

to make or become deep or deeper: Larger ships will be able to navigate the river after the main channel is deepened. The shadows deepened toward late afternoon.
Meteorology. to decrease in atmospheric pressure: a deepening cyclone.

Origin of deepen

First recorded in 1595–1605; deep + -en1
Related formsdeep·en·er, noundeep·en·ing·ly, adverbo·ver·deep·en, verb (used with object)un·deep·ened, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for deepened

Contemporary Examples of deepened

Historical Examples of deepened

  • For more than an hour, there was perfect stillness, as the shades of evening deepened.


    Lydia Maria Child

  • Sidney, as tender as ever, had lost a little of the radiance from her eyes; her voice had deepened.


    Mary Roberts Rinehart

  • With deepened discomfort, Martin hurried to the creek to water the horses.


    Mr. and Mrs. Haldeman-Julius

  • The gloomier colourings of his mind had been deepened, too, by secret remorse.

    Leila, Complete

    Edward Bulwer-Lytton

  • Vere felt that somehow her eager suggestion had deepened the constraint.

    A Spirit in Prison

    Robert Hichens

British Dictionary definitions for deepened



to make or become deep, deeper, or more intense
Derived Formsdeepener, noun
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 deepened



c.1600, from deep (adj.) + -en (1). Related: Deepened; deepening. The earlier verb had been simply deep, from Old English diepan.

Online Etymology Dictionary, © 2010 Douglas Harper