Definitions of final:

• noun:   the final match between the winners of all previous matches in an elimination tournament
• noun:   an examination administered at the end of an academic term
• adjective:   conclusive in a process or progression

  Example: "The final answer"

• adjective:   not to be altered or undone

  Example: "The judge's decision is final"

• adjective:   occurring at or forming an end or termination

  Example: "The final chapter"