|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
|a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.|
|1.||occurring at the same time; contemporaneous|
|2.||physics (of periodic phenomena, such as voltages) having the same frequency and phase|
|3.||occurring or recurring exactly together and at the same rate: the synchronous flapping of a bird's wings|
|[C17: from Late Latin synchronus, from Greek sunkhronos, from |
synchronous syn·chro·nous (sĭng'krə-nəs, sĭn'-)
Occurring or existing at the same time.