Final answer:
A Brønsted-Lowry base is a proton acceptor.
Step-by-step explanation:
A Brønsted-Lowry base is a proton (hydrogen ion) acceptor. In other words, a base is a species that can accept a proton from another molecule. The Brønsted-Lowry acid-base theory defines an acid as a proton donor and a base as a proton acceptor.