A passage, course, or way straight across; esp. as opposed to going round a corner or by a circuitous route. Also concrete, and figurative.

A straight course or path; literal and figurative. (Chiefly after Shakespeare.)

Chiefly U.S. A direct line through the air; a straight line between two points on the earth's surface.

A straight line or course, such as a bee follows in returning to its hive after having collected a full load of nectar; (occasionally) the course…

see crow-flight n.

a direct course, a straight line (cf. sense 3c); also quasi-adv.