Informant — Defs

01 n. One who, or that which, informs, animates, or vivifies.

1.
One who, or that which, informs, animates, or vivifies.[Obs.]
2.
One who imparts information or instruction.
3.
One who offers an accusation; an informer. See Informer.[Obs. or R.] See: Informer
“It was the last evidence of the kind; the informant was hanged.” — Burke.