1 done or acting without thought and for no particular reason or purpose;
SYNSENSELESS:
mindless violence * mindless vandals
2 not needing thought or intelligence
SYNDULL:
a mindless and repetitive task
3 ~ of sb/sth (written) not remembering sb/sth and not considering them or it when you do sth:
We explored the whole town, mindless of the cold and rain.
mindlessly adverb:
There is no excuse for mindlessly destroying public property.
