A theoretical line (physically or mentally) followed from a point of origin or towards a destination. May be relative (e.g. up, left, outbound, dorsal), geographical (e.g. north), rotational (e.g. clockwise), or with respect to an object or location (e.g. toward Boston).

Instructions for how to reach a destination or how to do something

plural of direction

Indicating direction. / Of or relating to guidance or help.

Something that indicates direction, such as a vehicle's turn signal.

Providing adequate direction; directive

plural of directional

Directly.

To manage, control, steer. / To aim (something) at (something else). / To point out to or show (somebody) the right course or way; to guide, as by pointing out the way.

Proceeding without deviation or interruption. / Straight; not crooked, oblique, or circuitous; leading by the short or shortest way to a point or end. / Straightforward; sincere.