[mass noun]the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells 免疫力 immunity to typhoid seems to have increased spontaneously. 对伤寒的免疫力似乎已经自然地加强了。 ■protection or exemption from something, especially an obligation or penalty 保护;免除(某物,尤指免除义务或责罚) the rebels were given immunity from prosecution. 叛乱者得以免受起诉。 ■(Law)officially granted exemption from legal proceedings (律)豁免 ■(immunity to)lack of susceptibility, especially to something unwelcome or harmful 抗扰度 products must have an adequate level of immunity to interference. 产品必须有足够的抗干扰度。 [count noun]exercises designed to build an immunity to fatigue. 为抗疲劳设计的锻炼。
语源
late Middle English: in the sense 'exemption (from a liability'): from Latin immunitas, from immunis (see immune)