from the GNU version of the Collaborative International Dictionary of English
- adj. a coat whose skirts are cut away in front so as not to meet at the bottom.
Sorry, no etymologies found.
Then he handed it to me and rubbed his hands together quickly, glad to be warm; he wore a black cutaway coat with silk lapels, black-and-white-checked pants, and a wing collar with a black ascot tie.
And I saw — as they had survived and as they had been when new — a boy's suit with brass buttons and knee pants; a postman's uniform; and a man's suit including a cutaway coat with silk-faced lapels, raveling and dusty in the original, fresh and shiny in the replica.