Meaning

• (focus) Likewise.

• Also; in addition.

  "There has been a cutback in federal subsidies. Too, rates have been increasing."

• (degree) To an excessive degree; over; more than enough.

• (degree) To a high degree, very.

  "She doesn't talk too much.  I'm not too sure about this."

• (affirmation) Used to contradict a negative assertion.

  ""You're not old enough yet."  "I am, too!""