noun. 
                    An apartment on one floor of a building.
                  
                
                  
                    noun. 
                    A story in a house.
                  
                
                  
                    adjective. 
                    undefined
                  
                
                  
                    adjective. 
                    Having a smooth, even surface: synonym:  level.
                  
                
                  
                    adjective. 
                    Having a relatively broad level surface in relation to thickness or depth.
                  
                
                  
                    adjective. 
                    undefined
                  
                
                  
                    adjective. 
                    Being in horizontal position; lying down.
                  
                
                  
                    adjective. 
                    Being without slope or curvature.
                  
                
                  
                    adjective. 
                    Having a low heel or no heel.
                  
                
                  
                    adjective. 
                    Free of qualification; absolute.
                  
                
                  
                    adjective. 
                    Fixed; unvarying.
                  
                
                  
                    adjective. 
                    Lacking interest or excitement; dull.
                  
                
                  
                    adjective. 
                    undefined
                  
                
                  
                    adjective. 
                    Lacking in flavor.
                  
                
                  
                    adjective. 
                    Having lost effervescence or sparkle.
                  
                
                  
                    adjective. 
                    undefined
                  
                
                  
                    adjective. 
                    Deflated. Used of a tire.
                  
                
                  
                    adjective. 
                    Electrically discharged. Used of a storage battery.
                  
                
                  
                    adjective. 
                    Of or relating to a horizontal line that displays no ups or downs and signifies the absence of physiological activity.
                  
                
                  
                    adjective. 
                    Of or relating to a hierarchy with relatively few tiers or levels.
                  
                
                  
                    adjective. 
                    Commercially inactive; sluggish.
                  
                
                  
                    adjective. 
                    Unmodulated; monotonous.
                  
                
                  
                    adjective. 
                    Lacking variety in tint or shading; uniform.
                  
                
                  
                    adjective. 
                    Not glossy; matte.
                  
                
                  
                    adjective. 
                    undefined
                  
                
                  
                    adjective. 
                    Being below the correct pitch.
                  
                
                  
                    adjective. 
                    Being one half step lower than the corresponding natural key.
                  
                
                  
                    adjective. 
                    Designating the vowel a as pronounced in bad or cat.
                  
                
                  
                    adjective. 
                    Taut. Used of a sail.
                  
                
                  
                    adverb. 
                    undefined
                  
                
                  
                    adverb. 
                    Level with the ground; horizontally.
                  
                
                  
                    adverb. 
                    On or up against a flat surface; at full length.
                  
                
                  
                    adverb. 
                    So as to be flat.
                  
                
                  
                    adverb. 
                    undefined
                  
                
                  
                    adverb. 
                    Directly; completely.
                  
                
                  
                    adverb. 
                    Exactly; precisely.
                  
                
                  
                    adverb. 
                    Below the intended pitch.
                  
                
                  
                    adverb. 
                    Without interest charge.
                  
                
                  
                    noun. 
                    A flat surface or part.
                  
                
                  
                    noun. 
                    A stretch of level ground.
                  
                
                  
                    noun. 
                    A shallow frame or box for seeds or seedlings.
                  
                
                  
                    noun. 
                    A movable section of stage scenery, usually consisting of a wooden frame and a decorated panel of wood or cloth.
                  
                
                  
                    noun. 
                    A flatcar.
                  
                
                  
                    noun. 
                    A deflated tire.
                  
                
                  
                    noun. 
                    A shoe with a flat heel.
                  
                
                  
                    noun. 
                    A large flat piece of mail.
                  
                
                  
                    noun. 
                    A horse that competes in a flat race.
                  
                
                  
                    noun. 
                    undefined
                  
                
                  
                    noun. 
                    A sign (♭) used to indicate that a note is to be lowered by a semitone.
                  
                
                  
                    noun. 
                    A note that is lowered a semitone.