Definition from Wiktionary, the free dictionary
See also Synoptic
From New Latin synopticus, from Ancient Greek συνοπτικός (sunoptikos, “seeing the whole together or at a glance”), from σύνοψις (sunopsis, “a general view, synopsis”), from σύν (sun, “with”) + ὄψις (opsis, “view”).
- Of, or relating to a synopsis
- In general, pertaining to or affording an overall view. In meteorology, this term has become somewhat specialized in referring to the use of meteorological data obtained simultaneously over a wide area for presenting a comprehensive and nearly instantaneous picture of the state of the atmosphere. Thus, to a meteorologist, synoptic takes the additional connotation of simultaneity.
Related terms 
- synoptic in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
- synoptic in The Century Dictionary, The Century Co., New York, 1911
- synoptic at OneLook Dictionary Search