What is the meaning of the word "waste"?

Definitions:

any materials unused and rejected as worthless or unwanted noun
- they collect the waste once a week
cause extensive destruction or ruin utterly verb
- The enemy lay waste to the countryside after the invasion
get rid of verb
- We waste the dirty water by channeling it into the sewer
run off as waste verb
- The water wastes back into the ocean
spend extravagantly verb
- waste not, want not
the trait of wasting resources noun
- a life characterized by thriftlessness and waste
use inefficiently or inappropriately verb
- waste heat