|Origin:||Medieval Latin superplus, from Latin plus 'more'|
sur‧plus1 [uncountable and countable]
an amount of something that is more than what is needed or used [= excess]:
Any surplus can be trimmed away.
a surplus of crude oil
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