in harmony (with someone or something)
1. In music, forming a pleasing combination. It can also, more specifically, refer to performing a song's harmony notes as someone else provides the melody. OK, stop, you guys aren't in harmony, and the song doesn't sound right. I need the sopranos to be in harmony with the altos here.
2. In agreement with someone or something; matching someone or something. Those two always seem to be in harmony about everything—I guess that's why they're best friends. The suspect's statement is not in harmony with the information witnesses have given us.
*in harmony(with someone or something)
1. Lit. in musical concord with someone or something. (*Typically: be ~; get ~.) This part is in harmony with the tenor's solo. The tenor part is not in harmony with the accompaniment.
2. Fig. agreeable or compatible with someone or something. (*Typically: be ~; get ~.) This is in complete harmony with our earlier discussions. Fred's position is quite clear. What you have said is not in harmony with Fred.
See also: harmony