1. （感情、反应等的）迸发，爆发，倾泻
An outpouring of something such as an emotion or a reaction is the expression of it in an uncontrolled way.

1. a large flow

Synonym: floodoverflow

2. the rapid and continuous delivery of linguistic communication (spoken or written)

e.g. a barrage of questions
a bombardment of mail complaining about his mistake

Synonym: barragebombardmentonslaught

3. the pouring forth of a fluid

Synonym: dischargerun

4. a sudden rapid flow (as of water)

e.g. he heard the flush of a toilet
there was a little gush of blood
she attacked him with an outpouring of words

Synonym: flushgush

5. a natural flow of ground water

Synonym: springfountainoutflownatural spring