I. sur ‧ plus 1 /ˈsɜːpləs $ ˈsɜːr-/ BrE AmE noun [uncountable and countable]
[ Date: 1300-1400 ; Language: Old French ; Origin: Medieval Latin superplus , from Latin plus 'more' ]
1 . an amount of something that is more than what is needed or used SYN excess :
Any surplus can be trimmed away.
surplus of
a surplus of crude oil
2 . the amount of money that a country or company has left after it has paid for all the things it needs:
a huge budget surplus of over £16 billion
⇨ ↑ trade surplus
II. surplus 2 BrE AmE adjective
1 . more than what is needed or used:
Ethiopia has no surplus food.
surplus cash/funds/revenues
Surplus cash can be invested.
2 . be surplus to requirements British English formal to be no longer necessary:
He found out he was surplus to requirements in London and left.