[UN-1 12.] Lack of concern, anxiety, or solicitude; indifference, equanimity.
1711. Steele, Spect., No. 75, ¶ 5. He … is in a fair way of doing all things with a graceful Unconcern, and Gentleman-like Ease.
1769. E. Bancroft, Guiana, 326. Their unconcern for futurity … is by no means singular.
1849. Eastwick, Dry Leaves, 93. Their faces were pale with terror, and they vainly attempted to simulate unconcern.
1865. W. G. Palgrave, Arabia, I. 116. We put on an appearance of great ignorance and unconcern.
