fit·ness /ˈfɪtnɪs/ n. 1. 适合，恰当；合理 the fitness of things 事物的合情合理 2. 合格，资格 He had a year in which to establish his fitness for the office. 他有一年的时间使自己的称职得到认可。 the candidate's fitness in education 候选人在教育程度上的够格 3. 健康 physical fitness 身体健康 a fitness test(军队等的)健康合格检查 a fitness campaign 提高健康水平的运动 do exercises to improve one's fitness 做体操以增强体质 4. 【生】(有机体对环境的)适应