(noun)
a rapid and vigorous stream of many things delivered at the same time, such as complaints, questions, or criticisms, often in a way that is overwhelming;
e.g. The teacher was not prepared for the barrage of questions from the students.
(noun)
a concentrated bombardment or line of artillery fire over a large area, often close to friendly/ally troops in order to shield them;
e.g. The troops laid down a barrage of fire to protect their soldiers.
(noun)
an artificial barrier such as a dam that is placed over a river in order to generate power, aid navigation, make the channel deeper, or prevent flooding;
e.g. The town installed a barrage over the river to prevent it from flooding when it rained.
(verb)
to present someone with a rapid and overwhelming stream of criticisms, questions, or complaints;
e.g. I didn't want to barrage him with questions.