INDIFFERENCE

apathy, indifference, numbness, spiritlessness

(noun) the trait of lacking enthusiasm for or interest in things generally

nonchalance, unconcern, indifference

(noun) the trait of remaining calm and seeming not to care; a casual lack of concern

emotionlessness, impassivity, impassiveness, phlegm, indifference, stolidity, unemotionality

(noun) apathy demonstrated by an absence of emotional reactions

indifference

(noun) unbiased impartial unconcern

Source: WordNet® 3.1

Etymology

Noun

indifference (countable and uncountable, plural indifferences)

The state of being indifferent.

Unbiased impartiality.

Unemotional apathy.

A lack of enthusiasm.

Unconcerned nonchalance.

Source: Wiktionary

In*dif"fer*ence, n. Etym: [L. indifferentia similarity, want of difference: cf. F. indifférence.]

1. The quality or state of being indifferent, or not making a difference; want of sufficient importance to constitute a difference; absence of weight; insignificance.

2. Passableness; mediocrity.

3. Impartiality; freedom from prejudice, prepossession, or bias. He . . . is far from such indifference and equity as ought and must be in judges which he saith I assign. Sir T. More.

4. Absence of anxiety or interest in respect to what is presented to the mind; unconcernedness; as, entire indifference to all that occurs. Indifference can not but be criminal, when it is conversant about objects which are so far from being of an indifferent nature, that they are highest importance. Addison.

Syn.

– Carelessness; negligence; unconcern; apathy; insensibility; coldness; lukewarmness.

Source: Webster’s Unabridged Dictionary 1913 Edition