intolerant UK /ɪnˈtɒləɹənt/US /ɪnˈtɑləɹənt/adjective 3noun 1forms 3 adjective3 •Unable or indisposed to tolerate, endure or bear. •[after a noun] Unable to digest food or be given substances of a certain composition without adverse effects.I am intolerant of lactose, so I can't drink milkI am lactose-intolerant, so I can't drink milk. •Not tolerant; close-minded about new or different ideas; indisposed to tolerate contrary opinions or beliefs; impatient of dissent or opposition; denying or refusing the right of private opinion or choice in others; inclined to persecute or suppress dissent.Whilst Congregationalists in England were complaining of the intolerant spirit of Episcopalians there — 1769 noun1 •One who is intolerant; a bigot.[…] a portion of the prejudice which darkened the spirits of these intolerants, might perhaps have cast its shadow over him. — 1856 formsintolerants · more intolerant · most intolerant