As a Noun:
1. A thing or a person which is one more thing or person in addition to the one you have just mentioned or have just been talking about, to make two in total. English = the one other.
2. A thing or a person which is not one of the people or things that you have just mentioned or have just been talking about, but is additional. English = the other one.
As a Verb or Adjective:
1. To be a thing or a person which is one more thing or person in addition to the one you have just mentioned or have just been talking about to make two in total. English = another, one other; (be) another, (be) one other.
2. To be a thing or a person which is one more thing or person in addition to the one or ones you have just mentioned or have just been talking about. English = another, one other; (be) another, (be) one other.
As Modifier:
1. Used at the beginning of a sentence to mean that what follows is in addition to the sort you or your partner have just mentioned. English = and another thing, moreover, what's more, and so on.
2. Used immediately after a question sign (e.g., 'who' or 'what' or ‘where’) to ask the same question a second time, but this time about something, someone or somewhere different (e.g., 'Who else?’ or ‘Who in addition?’). English = else, in addition.