Webster's English Dictionary

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intonation

in.to.na.tion \.in-t*-'na--sh*n\ \-shn*l, -sh*n-*l\ n 1: the act of 
   intoning and esp. of chanting  2: something that is intoned; specif : the 
   opening tones of a Grego rian chant 3: the manner of singing, playing, or 
   uttering tones  4: the rise and fall in pitch of the voice in speech  - 
   in.to.na.tion.al aj