noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The period of time a computer has functioned since last requiring a reboot. countable, uncountable
2. 2
   a period of time when something (as a machine or factory) is functioning and available for use wordnet
3. 3
   The amount of time, or the proportion of total time, during which some system or machinery is operable. countable, uncountable

   "To achieve uptime optimization, the machinery specification and actual design must be right."

Antonyms

All antonyms

downtime

Example

More examples

"The regular upkeep of our servers is paramount to ensuring high uptime."

Etymology

From up (“(computing) functional, working”, adjective) + time.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.