ink (Noun) — A liquid used for printing, writing or drawing.
ink (Noun) — Dark protective fluid ejected into the water by cuttlefish and other cephalopods.
ink (Verb) — Append one's signature to. ex. "They inked the contract"
ink (Verb) — Mark, coat, cover, or stain with ink. ex. "he inked his finger"
ink (Verb) — Fill with ink. ex. "ink a pen"