Definitions
1.nounA pigment (or dye)-based fluid used for writing, printing etc.
2.nounA particular type, color or container of this fluid.
3.nounThe black or dark-colored fluid ejected by squid, octopus etc, as a protective strategy.
4.nounPublicity."The TSA has been getting a lot of ink lately."
5.nounTattoo work.
6.nounCheap red wine.
7.verbTo apply ink to; to cover or smear with ink.
8.verbTo sign (a contract or similar document).
9.verbTo apply a tattoo to (someone).
10.verb(of a squid or octopus) to eject ink (sense 3)