■ preposition with the addition of.
↘ informal together with.
■ adjective
1》 [ postposition ] (after a number or amount) at least: $500,000 ~.
↘(after a grade) rather better than: B ~.
2》 (before a number) above zero; positive.
3》 having a positive electric charge.
■ noun
1》 short for ~ sign .
↘a mathematical operation of addition.
2》 informal an advantage.
■ conjunction informal furthermore; also.
Origin
C16: from L., lit. 'more'.