Definition of vocal, fall, slide and run?

I've been typing up my notes. But, I'm struggling to define vocal, falls, slides, and runs.

Could someone come up with simple definitions for these techniques?

Also, am I using the correct terms?

Nice work, Pip! Here are my definitions:

Fall: a (usually) short descending "fall" in pitch at the end of a note

Slide: a more gradual ascending slide from a lower pitch to a higher pitch

Run (or riff): more than one pitch sung on one syllable; usually 3 pitches or more in quick succession, with distinction between individual pitches without rearticulation