Asynchronous

Part of speech: adjective

Pronunciation: /eɪˈsɪŋkɹənəs/

Definitions

1. Not happening simultaneously, allowing independent processes to operate without waiting for one another and characterized by a lack of time synchronization
2. Describes events or processes that do not take place concurrently, enabling independent progression without timing coordination
3. Characterizes activities or operations that happen at different moments rather than simultaneously, allowing for separate execution

Etymology: The prefix in "asynchronous" is one of the oldest bits of the word. Its ancestor, the Greek "a-", meaning "not" or "without", traces back to a Proto-Indo-European negative particle, and it passed into Greek as an alpha-privative that could turn almost any word into its opposite. English took over the prefix freely, so "asynchronous" is essentially a Greek-style negation fastened onto "synchronous". That second half, "synchronous", is the more recent piece. It is built from Greek elements meaning "together" and "time", so the root idea is things happening at the same time. Adding "a-" simply reverses it: events that do not share a moment, and processes that can run without waiting for each other. Because the word is a plain formation from an existing English-usable stem, its meaning stays close to its parts. The prefix does the negating work, and the rest of the word carries the sense of shared timing.

Synonyms: non-simultaneous, uncoordinated, unrelated

Antonyms: synchronous