A very thin river.

“The brook had shrunk to a mere trickle.”

A very thin flow; the act of trickling.

“The tap of the washbasin in my bedroom is leaking and the trickle drives me mad at night.”

To pour a liquid in a very thin stream, or so that drops fall continuously.

“The doctor trickled some iodine on the wound.”

To flow in a very thin stream or drop continuously.

“Here the water just trickles along, but later it becomes a torrent.”

To move or roll slowly.