adjective, chum·mi·er, chum·mi·est. Informal.

friendly; intimate; sociable.

Origin of chummy

First recorded in 1825–35; chum1 + -y1
Related formschum·mi·ly, adverbchum·mi·ness, noun

Synonyms for chummy Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Historical Examples of chummy

British Dictionary definitions for chummy


adjective -mier or -miest

informal friendly
Derived Formschummily, adverbchumminess, 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 chummy

1874, from chum (n.1) + -y (2). Related: Chumminess. Previously it was a noun, a common name for a chimney sweep, as a corruption of chinmey.

Online Etymology Dictionary, © 2010 Douglas Harper