Answer
According to the Brønsted- Lowry definition of acids and bases;
A Brønsted-Lowry acid is a proton (hydrogen ion) donor while a Brønsted-Lowry base is a proton (hydrogen ion) acceptor.
Work Step by Step
An example of a chemical equation that obeys the Brønsted-Lowry definition is given below:
$HCl_{(aq)} +NH_{3}{}_{(aq)} --> NH_{4}^{+}{}_{(aq)} + Cl^{-}{}_{(aq)}$