mum — meaning in English
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English meaning
- jiffy noun A very short, unspecified length of time.
Senses
mum is used for these senses in English:
- jiffy (colloquial) A very short, unspecified length of time. [from 1780.]
jiffy — full definition
- noun A very short, unspecified length of time.
- noun 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.
- noun The length of an alternating current power cycle (1/60 or 1/50 of a second).
- noun 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.