simple past tense and past participle of course

Contraction of of course.

(dated) Synonym of in due course

An expression emphasising that it is of at least equal importance as those ones already mentioned.

present participle of course

The sport of chasing wild animals, especially hares, with dogs by sight rather than by scent.

plural of coursing

A short course of additional training or updating knowledge of one's profession.

plural of back course

(aviation) The approach course formed by the rear lobe of the signal pattern of a localizer antenna array (the portion of the localizer signal emitted from the rear face of the antenna array), oriented in the reciprocal direction to the primary approach course (i.e., the back course - if a usable back course exists at all - will be rotated 180° from the primary course). Not all localizers produce a usable back-course signal; newer equipment radiates very little signal into the rear and side lobes, not enough to allow for a back-course approach.