1. Assume the truth of something, especially the very thing to be proved; avoid a difficult point
   "His argument begs the question by assuming what it's trying to prove"
    
2. (of a statement or argument) invite a follow up question or point
   "Her claim about the company's profits begs the question of how they were calculated"

Derived forms: begged the question, begging the question, begs the question

Encyclopedia: Beg the question