Meaning of “flow” - Learner’s Dictionary

flow

verb [ I ] uk us /fləʊ/
MOVEMENT

B1 If something such as a liquid flows, it moves somewhere in a smooth, continuous way:

The river flows from the Andes to the ocean.
Electric current flows down this wire.
TALK

If words, ideas, or conversations flow, they continue in an easy and relaxed way without stopping:

At dinner, the conversation flowed freely.

(Definition of “flow verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)