clear-headed
1. Having a clear head; clear of intellect.
| 1709 Hearne Collect. (Oxf. Hist. Soc.) II. 308 He was certainly a very clear-headed Man. 1818–60 Whately Commonpl. Bk. (1864) 145 A very clear-headed man must always perceive some of the truths which are generally overlooked. 1875 Hamerton Intell. Life 15 One of the most clear-headed and hard-working men of his generation. |
2. Characteristic of a clear head.
| 1857 W. Collins Dead Secret v. i. (1861) 197 Plain clear-headed common sense. 1863 P. Barry Dockyard Econ. 282 Clear-headed calculations. |
Hence clear-ˈheadedness.
| 1882 Society 14 Oct. 18/2, I still survive to marvel at your clear-headedness. 1884 F. P. Cobbe in Contemp. Rev. Dec. 796 A man of..almost abnormal clear-headedness. |