scatterbrain

or scat·ter·brains

[ skat-er-breyn ]
/ ˈskæt ərˌbreɪn /

noun

a person incapable of serious, connected thought.

Origin of scatterbrain

First recorded in 1780–90; scatter + brain

Related forms

scat·ter·brained, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for scatterbrained (1 of 2)

scatterbrained

/ (ˈskætəˌbreɪnd) /

adjective

exhibiting or characterized by lack of serious thought or concentration; disorganized; silly

British Dictionary definitions for scatterbrained (2 of 2)

scatterbrain

/ (ˈskætəˌbreɪn) /

noun

a person who is incapable of serious thought or concentration
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