- Navigation. the distance due east made good on any course tending eastward; easterly departure.
- a shifting eastward; easterly direction.
- Surveying. a distance east from a north-south reference line.
- nautical the net distance eastwards made by a vessel moving towards the east
- the distance eastwards of a point from a given meridian indicated by the first half of a map grid reference
- a longitudinal grid lineCompare northing (def. 3)