asynchronous

Events are asynchronous when they don't happen at the same time. If you pick up the crossword puzzle I started yesterday, we are working on it together but in an asynchronous fashion. Please do it in pencil.

Asynchronous is the opposite of synchronous, which means happening at the same time. Think of “synchronous” as “in synch” and asynchronous as “out of synch.” If we're chatting on the phone, our communication is “synchronous.” We respond to each other immediately and when we hang up, the conversation's over. Email is asynchronous because we respond whenever it's convenient. In some cases this means never, which can be mighty convenient.

Definitions of asynchronous
1

adj not synchronous; not occurring or existing at the same time or having the same period or phase

Synonyms:
allochronic
(of taxa) occurring in different geologic times
anachronic, anachronistic, anachronous
chronologically misplaced
nonsynchronous, unsynchronised, unsynchronized, unsynchronous
not occurring together
in series, nonparallel, serial
of or relating to the sequential performance of multiple operations
Antonyms:
synchronal, synchronic, synchronous
occurring or existing at the same time or having the same period or phase
synchronic
concerned with phenomena (especially language) at a particular period without considering historical antecedents
coetaneous, coeval, contemporaneous
of the same period
coexistent, coexisting
existing at the same time
co-occurrent, coincident, coincidental, coinciding, concurrent, cooccurring, simultaneous
occurring or operating at the same time
contemporaneous, contemporary
occurring in the same period of time
parallel
of or relating to the simultaneous performance of multiple operations
synchronic
(of taxa) occurring in the same period of geological time
synchronised, synchronized
operating in unison
show more antonyms...

adj (digital communication) pertaining to a transmission technique that does not require a common clock between the communicating devices; timing signals are derived from special characters in the data stream itself

Antonyms:
synchronous
(digital communication) pertaining to a transmission technique that requires a common clock signal (a timing reference) between the communicating devices in order to coordinate their transmissions

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