addition noun

1 sth that is added

ADJ. useful, valuable, welcome, worthy | important, major, notable, significant | latest, new, recent

VERB + ADDITION make We have made several additions to the collection recently.

PREP. ~ to the latest addition to the family (= a new baby)

2 process of adding numbers/amounts

ADJ. simple He worked it out through simple addition.

VERB + ADDITION do She can do addition, but she hasn't learned subtraction yet.