verb

• (transitive) To cease giving breast milk to an offspring; to accustom and reconcile (a child or young animal) to a want or deprivation of mother's milk; to take from the breast or udder.
  "The cow has weaned her calf."
• (transitive) To cease giving breast milk to an offspring; to accustom and reconcile (a child or young animal) to a want or deprivation of mother's milk; to take from the breast or udder.
  "His generation was weaned on 1980's music."
• (intransitive) To cease to depend on the mother's milk for nutrition.
  "The kittens are finally weaning."
• (transitive, by extension, normally "wean off") To cause to quit something to which one is addicted, dependent, or habituated.
  "He managed to wean himself off heroin."

noun

• (Scotland, Mid-Ulster, others) A young child.
  "I, being but a yearling wean."