What is the meaning of Reflux?

The backwards flow of any fluid.

A technique, using a reflux condenser, allowing one to boil the contents of a vessel over an extended period.

The leaking of stomach acid up into the oesophagus.

To flow back or return.

To boil a liquid in a vessel having a reflux condenser.

ebb, ebb tide

reflux

ebb, ebb tide

vicissitude

reflux

reflux

Source: wiktionary.org