again Definition

again
adverb

1. Once more; another time.

Thesaurus: another time, once more, encore, ditto, anew, repeatedly, afresh.
2. Back to (a previous condition or situation, etc).

Example: get well again
3. In addition.

Example: twice as much again
4. However; on the other hand.

Example: He might come, but then again he might not
5. Further; besides.

Idiom: again and again

Very often; repeatedly.
Thesaurus: repeatedly, over and over, continuously, continually, endlessly, ad infinitum.

Etymology: Anglo-Saxon ongean back.