「呼ぶ」(yobu) means to call out to someone, to summon someone, or to call a name. It can also mean to invite someone. It is a transitive verb. For example: 友達を呼ぶ。(Tomodachi o yobu.) = To call a friend.

人に声をかけて来させることです。「〜を呼ぶ」の形で使います。例：友達を呼ぶ。