1.verbTo express milk from (a mammal, especially a cow).
"The farmer milked his cows."
2.verbTo draw (milk) from the breasts or udder.
"to milk wholesome milk from healthy cows"
3.verbTo express any liquid (from any creature).
4.verbTo make excessive use of (a particular point in speech or writing, a source of funds, etc.); to exploit; to take advantage of (something).
"When the audience began laughing, the comedian milked the joke for more laughs."
5.verb(of an electrical storage battery) To give off small gas bubbles during the final part of the charging operation.
6.verbTo single-mindedly masturbate a male to ejaculation, especially for the amusement and/or satisfaction of the masturbator/trix rather than the person masturbated.
"Controlled milking can actually establish and consolidate a mistress’ dominance over her sub rather than diminish it."