aflat,adv.|əˈflæt| [a prep.1 of position + flat.] In a flat position, flatly. c1330Arth. & Mer. 9033 And Aroans with the swerd aflat.1626Bacon Sylva §426 Lay all his branches a-flat upon the Ground.1812W. Tennant Anster Fair iv. xxvii, Swop! there a jumper falls aflat upon the ground.