See more synonyms for underside on Thesaurus.com

Origin of underside

First recorded in 1670–80; under- + side1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for underside

undersurface, belly, base, bottom, sole, root, soffit, underneath

Examples from the Web for underside

Contemporary Examples of underside

Historical Examples of underside

  • He laid the phone down and looked to the underside viewscreen.

    Space Viking

    Henry Beam Piper

  • As he turned it over in his hand he observed some lettering on the underside.

    The Hand in the Dark

    Arthur J. Rees

  • The warriors were on the underside, and Henry fell upon them.

    The Eyes of the Woods

    Joseph A. Altsheler

  • Upon the underside of one of its sleeves there is a big ink blob.

    Sundry Accounts

    Irvin S. Cobb

  • The wire should now be protected from touching the bird on its underside.

    Practical Taxidermy

    Montagu Browne

British Dictionary definitions for underside


  1. the bottom or lower surface
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 underside

c.1680, from under + side (n.). Cf. Dutch onderzijde, Danish underside, German unterseite.

Online Etymology Dictionary, © 2010 Douglas Harper