adj.
Pronunciation: ˌ ə n- ' thi ŋ -ki ŋ
Function: adjective
Date: 1676
1 : not taking thought : HEEDLESS , UNMINDFUL <the unthinking onlookers>
2 : not indicating thought or reflection <an unthinking decision>
3 : not having the power of thought
– un · think · ing · ly \ -ki ŋ -l ē \ adverb