a priori/ˌeɪ praɪˈɔ:raɪ; `epraɪ`ɔraɪ/ (using reasoning that proceeds) from known causes to imagined effects, eg saying `They've been walking all day so they must be hungry.' （用推理方法）由已知原因推测出结果（如说 ‘他们走了一整天, 那么他们一定饿了.’） Cf 参看 a posteriori.
牛津英汉双解词典