1. [adj]  one more or an added; "another chance"; "another cup of coffee"; "an additional piece of pie"
2. [adj]  distinctly separate from the first; "that's another (or different) issue altogether"
3. [adj]  any of various alternatives; some other; "put it off to another (or some other) day"

ANOTHER(A) is a 10 letter word that starts with A.