uptime

U1P3T1I1M3E1

noun

The period of time a computer has functioned since last requiring a reboot.

Opposite
downtime
OriginEnglish time ← Middle English tyme ← Old English tīma →
Less commonScrabble 10
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Meanings

nounuptime (countable and uncountable, plural uptimes)

plural uptimes

  1. countableuncountablecomputingThe period of time a computer has functioned since last requiring a reboot.
  2. countableuncountableThe amount of time, or the proportion of total time, during which some system or machinery is operable.

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

    2006, Fred K. Geitner and Heinz P. Bloch, chapter 1, in Maximizing Machinery Uptime, Elsevier, →ISBN, page 1

Synonyms & antonyms

Opposite
downtime

nouna period of time when something (as a machine or factory) is functioning and available for use

Opposite
downtime
Broader
time periodperiod of timeperiod

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*upó
  2. Proto-Germanic*ub
  3. Proto-Germanic*upp
  4. Proto-West Germanic*upp
  5. Old Englishupp
  6. Middle Englishup
  7. Englishup
  8. Proto-Indo-European*deh₂-
  9. Proto-Indo-European*deh₂y-
  10. Proto-Indo-European*dih₂-mon-
  11. Proto-Germanic*tīmô
  12. Proto-West Germanic*tīmō
  13. Old Englishtīma
  14. Middle Englishtyme
  15. Englishtime
  16. Englishuptime

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

Full word history & related roots →

Rhymes & wordplay

Anagrams

impute
Cite this entry
APA

uptime. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/uptime

MLA

“uptime.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/uptime. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “uptime,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/uptime.

Source: uptime on Wiktionary, CC BY-SA 4.0.