indifferent

Short definition from Wiktionary

Adjective

1. 1
   Ambivalent; unconcerned; uninterested, apathetic.
2. 2
   Indicating or reflecting a lack of concern or care.
3. 3
   Mediocre (usually used negatively in modern usage).
4. 4
   Having no preference.
5. 5
   Unbiased, impartial, judging fairly.
6. 6
   Not making a difference; without significance or importance.
7. 7
   Being in the state of neutral equilibrium.
8. 8
   Not different, matching.

Noun

1. 1
   A person who is indifferent or apathetic.

Adverb

1. 1
   To some extent, in some degree (intermediate between very and not at all); moderately, tolerably, fairly.
2. 2
   Without distinction or preference for some over others.