This may be an easy question... but I have limited Theory knowledge so...
I have heard the word Trill being used to describe a method of adding multiple notes into one beat.
Now from what I understand of a Triplet, it is a method of playing 3 notes in any one beat.
If this is so, does this mean a "Triplet" is in fact a "Trill" in theory or are there subtle differences in their meanings?