The tide which occurs at or soon after the new and full moon, and rises higher than common tides, the ebb sinking correspondingly lower.(noun)
Hence Figuratively, any great flood or influx.(noun)
The Century Dictionary (Public Domain)
Use "spring-tide" in a sentence
"The regulations also ban lead shot being used to kill any birds below the coastal spring-tide high-water mark or in specified wetlands."
"This turf graciously invites me to seek my brother Cyclopes for revel in the spring-tide."
"We reflect this day on the essence of intimacy, from its origins in the spring-tide of youth to an afterward secured in distant mist – in awe for the reason and to what end it endures."