Definitions

1. adjective

capable of being spent or used up, especially in a way that is wasteful or unwise

“The company’s policy of throwing away unsold products made them seem careless and wasteful, and it was seen as an expendable practice.”

2. noun

a person or thing that can be sacrificed or spent without loss

“In the military, a pilot may be considered expendable in a situation where the goal is to save the entire crew.”