1. Having no particular interest or concern; apathetic: indifferent to the sufferings of others.2. Having no marked feeling for or against: She remained indifferent toward their proposal.3. Not mattering one way or the other: It's indifferent to me which outfit you choose.4. Characterized by a lack of partiality; unbiased: an indifferent judge.5. Being neither too much nor too little; moderate. 6. Being neither good nor bad; mediocre: an indifferent performance. See synonyms at average. 7. Being neither right nor wrong. 8. Not active or involved; neutral: an indifferent chemical in a reaction.9.Biology Undifferentiated, as cells or tissue.
ETYMOLOGY:
Middle English, from Old French, from Latin indifferns, indifferent- : in-, not; see in1 + differns, different; see different.