Antonym: concern, interest. Similar words: indifferent, difference, make a difference, different, differentiate, reference, inference, deference. Meaning: [ɪn'dɪfrəns] 
n. 1. unbiased impartial unconcern 2. apathy demonstrated by an absence of emotional reactions 3. the trait of lacking enthusiasm for or interest in things generally 4. the trait of remaining calm and seeming not to care; a casual lack of concern.
n. 1. unbiased impartial unconcern 2. apathy demonstrated by an absence of emotional reactions 3. the trait of lacking enthusiasm for or interest in things generally 4. the trait of remaining calm and seeming not to care; a casual lack of concern. 
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1. All politics are based on the indifference of the majority. 
2. Determined to be tired heartless indifference.
3. She showed total indifference to his fate.
4. Artie treated most women with indifference.
5. He treats the pain with indifference.
6. He was piqued by her indifference.
7. Ellis spoke with a casual indifference that he did not feel.
8. Rumor stops at indifference.
9. She had built up a protective shell of indifference around herself.
10. He made an affectation of indifference.
11. She managed to maintain a facade of indifference.
12. The only weapon left in his armoury was indifference.
13. He was annoyed by her apparent indifference.
14. Their father treated them with indifference.
15. She listened to his remarks with studied indifference.
16. He treated me with indifference.
17. She met his criticism with indifference.
18. He treated my request with indifference.
19. "Giles phoned this morning," Mirella said with feigned indifference.
20. He adopted an air of indifference.
21. He swung from mere indifference to outright scorn.
22. She handled the matter with seeming indifference.
23. Her behaviour was usually misread as indifference.
24. To all his problems she affected indifference.
25. His indifference was a fuel to her hatred.
26. She adopted an attitude of supreme indifference.sentence dictionary
27. 'Who cares?' said Alex[sentencedict.com], feigning indifference.
28. He feigned indifference to criticism of his work.
29. His attitude was one of bored indifference.
30. She hid her true feelings behind a shield of cold indifference.
More similar words: indifferent, difference, make a difference, different, differentiate, reference, inference, deference, conference, preference, differ, interference, differ from, coherence, reverence, irreverence, deferential, serendipity, preferential, deferentially, occurrence, indulgence, independence, diffident, difficult, declaration of independence, offer, duffer, buffer, offering.