upcall

U1P3C3A1L1L1

noun

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

RareScrabble 10
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

nounupcall (plural upcalls)

plural upcalls

  1. computingA call from a lower-level subsystem, such as a kernel or framework, to a higher-level subsystem, such as user code.
verbupcall (third-person singular simple present upcalls, present participle upcalling, simple past and past participle upcalled)

present singular third person upcalls · participle present upcalling · participle past upcalled · past upcalled

  1. To perform such a call.

Origin

From up- + call.

Full word history & related roots →
Cite this entry
APA

upcall. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/upcall

MLA

“upcall.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/upcall. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “upcall,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/upcall.

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