Entry 2 senses · 2 variants Webster, 1913 Synchronal · Syn·chro·nal · IPA a. n. 01 a. Happening at, or belonging to, the same time; synchronous; simultaneous. 1. Happening at, or belonging to, the same time; synchronous; simultaneous. 02 n. A synchronal thing or event. 1. A synchronal thing or event.