1.the male with the highest rank in a group of animals such as chimpanzees 雄性头领〔黑猩猩等动物群体中地位最高的雄性动物〕
2.the man who has the most power and influence and the highest socialposition in a particular group – used humorously 阿尔法男性〔某一群体中最有权势和影响力的男子;幽默用法〕
Examples from the Corpus
alpha male• They were also friendlier towards femaleinfants and those not fathered by the currentalpha male.• You see it in nonhuman primates, where the new alpha male comes into the troop and mates.