An area that is lower in topography than its surroundings.
Four consecutive quarters of negative, real GDP growth. See NBER.
A state of mind producing serious, long-term lowering of enjoyment of life or inability to visualize a happy future.
A lowering, in particular a reduction in a particular biological variable or the function of an organ, in contrast to elevation.
A period of major economic contraction.
The act of lowering or pressing something down.
A period of low morale or unhappiness (a period of experiencing the above-mentioned state of mind) which lasts longer than several weeks and may include ideation of self-inflicted injury or suicide.
An area of lowered air pressure that generally brings moist weather, sometimes promoting hurricanes and tornadoes.
An overhanging rock wall.
The external covering at the top of a building.
The top external level of a building.
The upper part of a cavity.
The surface or bed of rock immediately overlying a bed of coal or a flat vein.
To cover or furnish with a roof.
To traverse buildings by walking or climbing across their roofs.
To put into prison, to bird.
To shelter as if under a roof.