a. rare. [f. STAIR sb. + -LESS.] Having no stairs.
1846. Ottawa Free Trader, 24 April, 1/4. [Genius] often proves it to be a giddy height, from which the mind that occupies it is apt to be precipitated down a stairless descent.
1868. Macdonald, R. Falconer, I. 283. Out at his eyes it would go, traverse the dim stairless space, and sport with the wind-blown monster.
1897. Mary Kingsley, W. Africa, 422. The population has been employed in hauling and hoisting the furniture on to the stairless verandah.