adjective Proceeding without deviation or interruption.
adjective Straight; not crooked, oblique, or circuitous; leading by the short or shortest way to a point or end.
the most direct route between two buildings
adjective Straightforward; sincere.
adjective Immediate; express; plain; unambiguous.
adjective In the line of descent; not collateral.
a descendant in the direct line
adjective In the direction of the general planetary motion, or from west to east; in the order of the signs; not retrograde; said of the motion of a celestial body.
adjective Pertaining to, or effected immediately by, action of the people through their votes instead of through one or more representatives or delegates.