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. adjective
    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
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    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
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  2. adjective
    (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
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    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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