weaning

(noun) the act of substituting other food for the mother's milk in the diet of a child or young mammal. Synonyms: ablactation.

(verb) gradually deprive (infants and young mammals) of mother's milk. Synonyms: wean, ablactate. Examples: "She weaned her baby when he was 3 months old and started him on powdered milk." "The kitten was weaned and fed by its owner with a bottle."

(verb) detach the affections of. Synonyms: wean.