Definition of "Indifferent" :
adjective: showing no care or concern in attitude or action
"Indifferent to the sufferings of others."
adjective: (usually followed by to') unwilling or refusing to pay heed
adjective: (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)."
adjective: marked by a lack of interest
"The universe is neither hostile nor friendly; it is simply indifferent."
adjective: neither too great nor too little
"A couple of indifferent hills to climb."
adjective: being neither good nor bad
"An indifferent performance."
adjective: characterized by a lack of partiality
"A properly indifferent jury."
adjective: marked by no especial liking or dislike or preference for one thing over another
"Indifferent about which book you would give them."
adjective: having only a limited ability to react chemically; chemically inactive
"An indifferent chemical in a reaction."
adjective: fairly poor to not very good
"Has an indifferent singing voice."