breastfeed /ˈbɹɛs(t)fiːd/verb 2noun 1forms 4 verb2 •To feed (a baby) milk via the breasts; to suckle; to nurse.This is a designated place for mothers to breastfeed their babies.She stopped breastfeeding after a few months. •To nurse, to suck milk from a breast.Avoid using a bottle until confident your baby is breastfeeding effectively. — 2013 noun1 •An instance of feeding milk to a baby from the breasts; a breastfeeding. formsbreastfed · breast-fed · breastfeeding · breastfeeds