There are different definitions of intonation at
http://www.merriam-webster.com/dictionary/intonation
In general, it is a manner of riaing and falling pitch when speaking or chanting, or the ability or inability sing on key.
what is intonation and stress
2 answers
The word "stress" in this context means how loudly you say each syllable in comparison with the other syllables in the word or sentence.
in ton A tion -- In that word, the third syllable is "stressed."
in ton A tion -- In that word, the third syllable is "stressed."