If liquid trickles somewhere, it flows slowly and without force in a thin line. (Cambridge Dictionary)
To arrive or move somewhere slowly and gradually in small numbers. (Cambridge Dictionary)
(of a liquid) flow in a small stream. (Oxford Dictionaries)
To issue or fall in drops. (Merriam – Webster)
When a liquid trickles, or when you trickle it, it flows slowly in very small amounts. (Collins Dictionary)
Definition of trickle by The Free Dictionary.
What is trickle down theory? definition and meaning.