Chime In Meaning

(idiomatic) To agree, to harmonize, to concord.

Example:   We appreciate your input, so please don't hesitate to chime in with comments and questions.
1843, E.A.Poe, Morning on the Wissahiccon
  What I saw upon this cliff, although surely an object of very extraordinary nature, the place and season considered, at first neither startled nor amazed me—so thoroughly and appropriately did it chime in with the half-slumberous fancies that enwrapped me.