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[uhn-der-sahyd] /ˈʌn dərˌsaɪd/
an under or lower side.
Origin of underside
First recorded in 1670-80; under- + side1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for underside
Contemporary Examples
Historical Examples
  • 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
  • It is an evergreen, and its name is descriptive of the underside of the leaf.

    American Forest Trees

    Henry H. Gibson
British Dictionary definitions for underside


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
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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
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