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

OTHER WORDS FROM scatterbrain

scat·ter·brained, adjective

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