tolerance UK /ˈtɒl.ə.ɹəns/US /ˈtɑ.lə.ɹəns/noun 6verb 1forms 3 noun6 •The ability or practice of tolerating; an acceptance of or patience with the beliefs, opinions or practices of others; a lack of bigotry. •The ability of the body (or other organism) to resist the action of a poison, to cope with a dangerous drug or to survive infection by an organism. •Resistance to drunkenness.Since he hadn't had any alcohol in years, his tolerance was very low, and it only took two drinks for him to get sloshed. •The ability of the body to accept a tissue graft without rejection. •The variation or deviation from a standard, especially the maximum permitted variation in an engineering measurement.Our customers can generally accept ten times the tolerance which we can achieve in our machining operations. •The ability to endure pain or hardship; endurance. verb1 •To design or engineer a material to a specified tolerance. formstoleranced · tolerancing · tolerances