Definify.com
Webster 1913 Edition
Pivot
1. 
A fixed pin or short axis, on the end of which a wheel or other body turns. 
2. 
The end of a shaft or arbor which rests and turns in a support; 
as, the 
. pivot 
of an arbor in a watch3. 
Hence, figuratively: A turning point or condition; that on which important results depend; 
as, the 
. pivot 
of an enterprise4. 
(Mil.) 
The officer or soldier who simply turns in his place whike the company or line moves around him in wheeling; – called also 
pivot man
. Pivot bridge
, a form of drawbridge in which one span, called the pivot span, turns about a central vertical axis. 
– Pivot gun
, a gun mounted on a pivot or revolving carriage, so as to turn in any direction. 
– Pivot tooth 
(Dentistry)
, an artificial crown attached to the root of a natural tooth by a pin or peg.
 Piv′ot
,Verb.
 T.
 [
imp. & p. p. 
Pivoted
; p. pr. & vb. n. 
Pivoting
.] To place on a pivot. 
Clarke.
 Webster 1828 Edition
Pivot
PIV'OT
,Noun.