A person who is indifferent or apathetic.
Not caring or concerned; uninterested, apathetic.
Indicating or reflecting a lack of concern or care.
Mediocre (usually used negatively in modern usage).
Having no preference or bias, being impartial.
Not making a difference; without significance or importance.
Being in the state of neutral equilibrium.
Not different, matching.
To some extent, in some degree (intermediate between very and not at all); moderately, tolerably, fairly.