tight-lipped

[ tahyt-lipt ]
/ ˈtaɪtˈlɪpt /

adjective

speaking very little; taciturn; close-mouthed.
having the lips drawn tight.

Origin of tight-lipped

First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tight-lipped

British Dictionary definitions for tight-lipped

tight-lipped

adjective

reticent, secretive, or taciturn
with the lips pressed tightly together, as through anger

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