(construction) A layer in a wall, foundation etc. which prevents moisture spreading into interior areas.

plural of conversion course

An academic course by which a student studying a certain subject can change to another subject.

A course of study conducted via electronic media, especially via the Internet.

plural of e-course

(navigation) The estimated course that a boat should steer in order to arrive at a waypoint, bearing in mind the effects that wind and tide will have on the vessel.

Informal form of of course.

plural of course to steer

(cycling) A location where bicycles are maintained between races.

plural of service course