Definition of "expendable"

expendable

/ɪkˈspɛndəbəl/

adjective
comparative more expendable, superlative most expendable
1. Able to be expended; not inexhaustible.
2. Designed for a single use; not reusable.
3. Not essential or mandatory in order to achieve a goal.
4. Regarded as not worth preserving or saving; able to be sacrificed.
  Quotations
  The Taunton-Minehead line (now managed by the West Somerset Railway) was considered much more expendable.
  2020 April 8, Howard Johnston, “East-ended? When the ECML was at risk”, in Rail, page 69
noun
plural expendables
1. An expendable person or object; usually used in the plural.