inrunning noun 2adjective 1forms 1 noun2 •an inlet.And Lancelot answer'd nothing, but he went, / And at the inrunning of a little brook / Sat by the river in a cove — 1859 •(no longer used) The act or the place of entrance adjective1 •Running or flowing inward.an inrunning current has at last become enabled to flow out by its old path again — 1890 formsinrunnings