(1):

(n.) One who begs; one who asks or entreats earnestly, or with humility; a petitioner.

(2):

(n.) One who makes it his business to ask alms.

(3):

(n.) One who is dependent upon others for support; - a contemptuous or sarcastic use.

(4):

(n.) One who assumes in argument what he does not prove.

(5):

(v. t.) To reduce to beggary; to impoverish; as, he had beggared himself.

(6):

(v. t.) To cause to seem very poor and inadequate.