Simple Definition of unthinking
: done or said in a foolish or careless way without thinking about the possible effects : behaving in a foolish or careless way without careful thought
Examples of unthinking
His unthinking agreement made me uneasy.
First Known Use of unthinking
Seen and Heard
What made you want to look up unthinking? Please tell us where you read or heard it (including the quote, if possible).