The adj indifferent has 10 senses (first 4 from tagged texts)
1. (4) apathetic, indifferent -- (marked by a lack of interest; "an apathetic audience"; "the universe is neither hostile nor friendly; it is simply indifferent")
2. (3) indifferent -- (showing no care or concern in attitude or action; "indifferent to the sufferings of others"; "indifferent to her plea")
3. (2) deaf, indifferent -- ((usually followed by `to') unwilling or refusing to pay heed; "deaf to her warnings")
4. (1) immaterial, indifferent -- ((often followed by `to') lacking importance; not mattering one way or the other; "whether you choose to do it or not is a matter that is quite immaterial (or indifferent)"; "what others think is altogether indifferent to him")
5. indifferent -- (fairly poor to not very good; "has an indifferent singing voice"; "has indifferent qualifications for the job")
6. inert, indifferent, neutral -- (having only a limited ability to react chemically; chemically inactive; "inert matter"; "an indifferent chemical in a reaction")
7. indifferent -- (marked by no especial liking or dislike or preference for one thing over another; "indifferent about which book you would give them"; "was indifferent to their acceptance or rejection of her invitation")
8. indifferent, unbiased, unbiassed -- (characterized by a lack of partiality; "a properly indifferent jury"; "an unbiasgoted account of her family problems")
9. indifferent, so-so -- (being neither good nor bad; "an indifferent performance"; "a gifted painter but an indifferent actor"; "her work at the office is passable"; "a so-so golfer"; "feeling only so-so"; "prepared a tolerable dinner"; "a tolerable working knowledge of French")
10. indifferent -- (neither too great nor too little; "a couple of indifferent hills to climb")