Antonyms of adj synchronous

2 senses of synchronous

Sense 1
synchronous (vs. asynchronous), synchronal, synchronic -- (occurring or existing at the same time or having the same period or phase; "recovery was synchronous with therapy"- Jour.A.M.A.; "a synchronous set of clocks"; "the synchronous action of a bird's wings in flight"; "synchronous oscillations")

asynchronous (vs. synchronous) -- (not synchronous; not occurring or existing at the same time or having the same period or phase)
        => allochronic -- ((of taxa) occurring in different geologic times)
        => anachronic, anachronous, anachronistic -- (chronologically misplaced; "English public schools are anachronistic")
        => nonsynchronous, unsynchronized, unsynchronised, unsynchronous -- (not occurring together)
        => serial, in series (predicate), nonparallel -- (of or relating to the sequential performance of multiple operations; "serial processing")

Sense 2
synchronous (vs. asynchronous) -- ((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)

asynchronous (vs. synchronous) -- ((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)

Similarity of adj synchronous

2 senses of synchronous

Sense 1
synchronous (vs. asynchronous), synchronal, synchronic -- (occurring or existing at the same time or having the same period or phase; "recovery was synchronous with therapy"- Jour.A.M.A.; "a synchronous set of clocks"; "the synchronous action of a bird's wings in flight"; "synchronous oscillations")
       => coetaneous, coeval, contemporaneous -- (of the same period)
       => coexistent, coexisting -- (existing at the same time)
       => coincident, coincidental, coinciding, concurrent, co-occurrent, cooccurring, simultaneous -- (occurring or operating at the same time; "a series of coincident events")
       => contemporaneous, contemporary -- (occurring in the same period of time; "a rise in interest rates is often contemporaneous with an increase in inflation"; "the composer Salieri was contemporary with Mozart")
       => parallel -- (of or relating to the simultaneous performance of multiple operations; "parallel processing")
       => synchronic -- ((of taxa) occurring in the same period of geological time)
       => synchronized, synchronised -- (operating in unison; "the synchronized flapping of a bird's wings")
          Also See-> synchronic#2

Sense 2
synchronous (vs. asynchronous) -- ((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)