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realtime

/ˈɹiːltaɪm/ · real·time
adjective
  1. Communicated as the events being responded to occur; communicated or proceeding without much delay (compare instantaneous, synchronous). The stock‑ticker updates in realtime, so traders see price changes the moment they happen.
  2. Of a system that responds to events or signals within a predictable time after their occurrence; specifically the response time must be within the maximum allowed, but is typically synchronous. The realtime monitoring system alerts engineers the instant a sensor exceeds its threshold.
Did you know? Although the hyphenated form "real‑time" is standard in formal writing, tech marketing often drops the hyphen, creating the solid compound "realtime" that has become common in product names.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Jul 22, 2026