A surplus is something extra or left over. If your tree produces more apples than you can eat, you can make applesauce with the surplus of apples.

The army surplus store sells old or out-of-date clothing and equipment that the military doesn't need. If you earn more money than you spend, then you have a surplus of cash. The word surplus has familiar parts: sur- is a shortened form of super, meaning "extra" or "additional," and plus just means "more."

Definitions of surplus

n a quantity much larger than is needed

excess, nimiety, surplusage
Type of:
overabundance, overmuch, overmuchness, superabundance
a quantity that is more than what is appropriate

adj more than is needed, desired, or required

surplus cheese distributed to the needy”
excess, extra, redundant, spare, supererogatory, superfluous, supernumerary
unnecessary, unneeded
not necessary

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