Word.ws English Dictionary

upcall

upcall noun: a call from a lower-level subsystem, such as a kernel or framework, to a higher-level subsystem, such as user code.

Noun

upcall (plural upcalls)

  1. A call from a lower-level subsystem, such as a kernel or framework, to a higher-level subsystem, such as user code.

Verb

upcall (third-person singular simple present upcalls, present participle upcalling, simple past and past participle upcalled)

  1. To perform such a call.

Forms of upcall

Noun
pluralupcalls
Verb
third-person singular presentupcalls
present participleupcalling
past participleupcalled
pastupcalled

Origin of upcall

From up- + call.

Questions about upcall

What does upcall mean?
Upcall means a call from a lower-level subsystem, such as a kernel or framework, to a higher-level subsystem, such as user code.
What part of speech is upcall?
Upcall can be a noun or a verb.
What is the plural of upcall?
The plural of upcall is upcalls.

Words near upcall in the dictionary

  1. upbursts
  2. UPC
  3. UPC code
  4. UPC codes
  5. UPCA
  6. upcall
  7. upcalled
  8. upcalling
  9. upcalls
  10. upcame
  11. upcanyon

Source and license

Adapted from Wiktionary: upcall (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “upcall.” Word.ws, https://word.ws/upcall. Based on Wiktionary, CC BY-SA 4.0.