Definition of "high tide"

high tide

noun
countable and uncountable, plural high tides
1. The natural tide at its highest level for a particular tidal cycle at a certain place.
2. The time of day when the sea has risen to its highest level.
3. (figuratively) A climax, culminating point or phase.
4. (euphemistic) Synonym of menstruation
  Quotations
  Do you not like Aunt Irma? I've got an aunt like that.It's my term for... my time of the month.What time of the month? The weekend?No... you know, it... it's high tide.But we're not on the coast.
  2006 Mar. 3, Graham Linehan, The IT Crowd, Season 1, Episode 6
5. (obsolete, rare) A great festival.