An abstract sphere of infinite radius which serves as the imaginary backdrop for celestial objects, and of which the visible sky is one hemisphere.
the figure of the universe as an imaginary sphere whose center is the Earth
To put a lid on (something).
A hermetically sealed top piece on a microchip such as the integrated heat spreader on a CPU.
In amateur radio, an incompetent operator.
A cap or hat.
One ounce of cannabis.
A restraint or control, as when "putting a lid" on something.
A kid (from the rhyming slang bin lid)
A bodyboard or bodyboarder.
The top or cover of a container.
A motorcyclist's crash helmet.