A type of bread that is small, hard, and in the shape of a ring. (Cambridge Dictionary)
A firm doughnut-shaped roll traditionally made by boiling and then baking. (Merriam – Webster)
A bagel is a ring-shaped bread roll. (Collins Dictionary)
A dense bread roll in the shape of a ring, made by boiling dough and then baking it. (Oxford Dictionaries)
Bagel meaning in Cambridge Dictionary.
Definition of bagel by Merriam – Webster