tolerant UK /ˈtɒləɹənt/US /ˈtɑːləɹənt/adjective 2noun 1forms 3 adjective2 •Tending to permit, allow, understand, or accept something.He's pretty tolerant of different political views, but don't ask him about religion. •Tending to withstand or survive.These plants are tolerant of drought and sunlight. noun1 •One who or that which tolerates something, especially a biological species. formstolerants · more tolerant · most tolerant