change a flat

: to make different in some particular : alter

: to make radically different : transform

: to give a different position, course, or direction to

: the act, process, or result of changing: such as

: alteration

: transformation

: lying at full length or spread out upon the ground : prostrate

: utterly ruined or destroyed

: resting with a surface against something

: a level surface of land

: a stretch of land without obstacles

: a flat part or surface

: in a flat manner : directly, positively

: in a complete manner : absolutely

: below the proper musical pitch

: flatten

: to lower in pitch especially by a half step

: to sing or play below the true pitch