jiffy

Short definition from Wiktionary

Noun

1. 1
   A very short, unspecified length of time.
2. 2
   A unit of time defined by the frequency of its basic timer – historically, and by convention, 0.01 of a second, but some computer operating systems use other values.
3. 3
   The length of an alternating current power cycle (1/60 or 1/50 of a second).
4. 4
   The time taken for light to travel a specified distance in a vacuum, usually one centimetre (approximately 33.3564 picoseconds), but sometimes one foot or the width of a nucleon.
5. 5
   Ellipsis of jiffy bag, a padded envelope.
6. 6
   Alternative form of Jiffy bag.