Define beggar. beggar synonyms, beggar pronunciation, beggar translation, English dictionary definition of beggar. n. 1. One who solicits alms for a living. 2. An impoverished person; a pauper. 3. Informal A man or a boy. tr.v. beg·gared , beg·gar·ing , beg·gars 1. Standing at the window, Sergei saw the cook and the beggar come out into the yard by the back door and make their way across the dirty snow to the shed. Olga glared wrathfully at her companion, shoved him aside with her elbow, unlocked the shed, and angrily banged the door. Thus, a beggar claims and request for some help, expressly demanding and requesting for money. In begging a person displays his miserable plight with the help of words or actions, which involves some communicative activity. The meaning of BEGGAR is someone who begs; especially : a usually unhoused person who lives by asking for money, food, etc.. How to use beggar in a sentence.