Antonyms of adj directional

2 of 3 senses of directional

Sense 1
directional (vs. omnidirectional) -- (relating to or indicating directions in space; "a directional microphone")

omnidirectional (vs. directional) -- (not directional; "omnidirectional antenna")

Sense 3
directing, directional, directive, guiding -- (showing the way by conducting or leading; imposing direction on; "felt his mother's directing arm around him"; "the directional role of science on industrial progress")

INDIRECT (VIA leading) -> following -- (going or proceeding or coming after in the same direction; "the crowd of following cars made the occasion seem like a parade"; "tried to outrun the following footsteps")

Similarity of adj directional

3 senses of directional

Sense 1
directional (vs. omnidirectional) -- (relating to or indicating directions in space; "a directional microphone")

Sense 2
directional -- (relating to direction toward a (nonspatial) goal; "he tried to explain the directional trends of modern science")

Sense 3
directing, directional, directive, guiding -- (showing the way by conducting or leading; imposing direction on; "felt his mother's directing arm around him"; "the directional role of science on industrial progress")
       => leading (vs. following) -- (going or proceeding or going in advance; showing the way; "we rode in the leading car"; "the leading edge of technology")