slot (n.1)

late 14c., "hollow at the base of the throat above the breastbone," from Old French esclot "hoofprint of a deer or horse," of uncertain origin, probably from Old Norse sloð "trail" (see sleuth). Original sense is rare or obsolete in Modern English; sense of "narrow opening into which something else can be fitted" is first recorded 1520s. Meaning "middle of the (semi-circular) copy desk at a newspaper," the spot occupied by the chief sub-editor, is recorded from 1917. The sense of "opening in a machine for a coin to be inserted" is from 1888 (slot machine first attested 1891). The sense of "position in a list" is first recorded 1942; verb sense of "designate, appoint" is from 1960s. Slot car first attested 1966.

slot (n.2)

"bar or bolt used to fasten a door, window, etc.," c. 1300, from Middle Dutch or Middle Low German slot (compare Old Norse slot, Old High German sloz, German Schloss "bolt, bar, lock, castle;" Old Saxon slutil "key," Dutch slot "a bolt, lock, castle"), from Proto-Germanic stem *slut- "to close" (source also of Old Frisian sluta, Dutch sluiten, Old High German sliozan, German schliessen "to shut, close, bolt, lock"), from PIE root *klau- "hook," also "peg, nail, pin," all things used as locks or bolts in primitive structures.

slot (v.1)

1747, "provide with a slot, cut slots in," from slot (n.1). Meaning "drop a coin in a slot" is from 1888. Sense of "take a position in a slot" is from 1940; that of "fit (something) into a slot" is from 1966. Oldest sense is obsolete: "stab in the base of the throat" (c. 1400). Related: Slotted; slotting.

slot (v.2)

1560s, "to bolt a door," from slot (n.2). Related: Slotted; slotting.

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Definitions of slot
slot (n.)
a position in a grammatical linguistic construction in which a variety of alternative units are interchangeable;
he developed a version of slot grammar
slot (n.)
a small slit (as for inserting a coin or depositing mail);
he put a quarter in the slot
slot (n.)
a time assigned on a schedule or agenda;
an aircraft landing slot
the TV program has a new time slot
Synonyms: time slot
slot (n.)
a position in a hierarchy or organization;
she beat some tough competition for the number one slot
Bob Dylan occupied the top slot for several weeks
slot (n.)
the trail of an animal (especially a deer);
he followed the deer's slot over the soft turf to the edge of the trees
slot (n.)
(computer) a socket in a microcomputer that will accept a plug-in circuit board;
the PC had three slots for additional memory
Synonyms: expansion slot
slot (n.)
a slot machine that is used for gambling;
they spend hours and hours just playing the slots
Synonyms: one-armed bandit
slot (v.)
assign a time slot;
slot a television program