A spy, saboteur, or terrorist who lives unobtrusively in a community until activated by a prearranged signal; may be part of a sleeper cell.
A railroad tie.
A goby-like bottom-feeding freshwater fish of the family Odontobutidae.
A type of pajama for a person, especially a child, that covers the whole body, including the feet.
A sleeper hold.
A heavy floor timber in a ship's bottom.
A nurse shark (family Ginglymostomatidae).
That which lies dormant, as a law.
A sedative.
A bet placed on the gambling table and then forgotten about by the gambler.
An automobile which has been internally modified to excess, while retaining a mostly stock appearance in order to fool opponents in a drag race, or to avoid the attention of the police.
A small starter earring, worn to prevent a piercing from closing.
Someone who sleeps.
Something that achieves unexpected success after an interval of time.
A structural beam in a floor running perpendicular to both the joists beneath and floorboards above.
A railway sleeping car.
The lowest, or bottom, tier of casks.
To mark a calf by cutting its ear.
A person who secretly watches and examines the actions of other individuals or organizations and gathers information on them (usually to gain an advantage).
A defensive player assigned to cover an offensive backfield player man-to-man when they are expected to engage in a running play, but the offensive player does not run with the ball immediately.
To act as a spy.
To search narrowly; to scrutinize.
To explore; to see; to view; inspect and examine secretly, as a country.
To spot; to catch sight of.