Definition - The use of pitch to add additional meaning to words.
Note: Tone refers to the pitch-pattern within a word, whereas intonation refers to the pitch-pattern of a whole clause or sentence.

Example -
Lianna? vs. Lianna!

Etymology -
The word derives from the Medieval Latin intonare, sing according to tone.

Oxford English Dictionary -
Its first citation in this sense is from 1791:
"The people of Inverness … are not only free from that unfortunate intonation of Aberdeenshire … but speak the English language with greater purity than they do in any other part in Scotland."
(T. Newte Tour Eng. & Scot. 201)

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