1. charge; cost; price
コーヒー代、払おうか？Shall I pay for the coffee?
2. generation; age; (school) year; cohort; reign
僕らの代にも、そういう問題は出ましたね。Such problems arose in our generation as well.
3. era
4. a representative of; on behalf of; for (someone)
after someone's name or title
5. switchboard number
used after a phone number
6. counter for decades of ages, eras, etc.
隊長は三十代と聞いていたんだけど。I'd heard the captain was thirty-something.
7. counter for generations (of inheritors to a throne, etc.)
何代前でも関係ありません。It doesn't matter how many generations back it was.
8. proxy application company
9. pronoun
used in dictionaries, etc.