Definition of feed-in:
(v) :
(transitive) To give (someone or something) food to eat.
(v) :
(intransitive) To eat (usually of animals).
(v) :
(ditransitive) To give (someone or something) to (someone or something else) as food.
(v) :
(transitive) To give to a machine to be processed.
(v) :
(transitive) To supply (a machine) with something to be processed.
(v) :
(transitive, figurative) To satisfy, gratify, or minister to (a sense, taste, desire, etc.).