Definition of pin
(Entry 1 of 4)
1a : a piece of solid material (such as wood or metal) used especially for fastening things together or as a support by which one thing may be suspended from another
b obsolete : the center peg of a target also : the center itself
c : something that resembles a pin especially in slender elongated form
an electrical connector pin
d(1) : one of the pieces constituting the target in various games (such as bowling)
(2) : the peg at which a quoit is pitched
(3) : the staff of the flag marking a hole on a golf course
e : a peg for regulating the tension of the strings of a musical instrument
f : the part of a key stem that enters a lock
g : a belaying pin
b : an ornament or emblem fastened to clothing with a pin
3 : leg —usually used in pluralwobbly on his pins
4 : a fall in wrestling
pin
verbpinned; pinning
Definition of pin (Entry 2 of 4)
1a : to fasten, join, or secure with a pin
b : to hold fast or immobile
c : to present (a young woman) with a fraternity pin as a pledge of affection
2a : fasten pinned his hopes on a miracle pin the blame on someone else
b : to assign the blame or responsibility for
pin the robbery on a night watchman
c : to define or determine clearly or precisely
—usually used with downit is hard to pin down exactly when things changed— Katharine Whittemore
3a : to make (a chess opponent's piece) unable to move without exposing the king to check or a valuable piece to capture
b of a wrestler : to secure a fall over (an opponent)
pin
adjectiveDefinition of pin (Entry 3 of 4)
1 : of or relating to a pin
2 of leather : having a grain suggesting the heads of pins
PIN
abbreviationDefinition of PIN (Entry 4 of 4)
personal identification number
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Time Traveler for pin
The first known use of pin was before the 12th century
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