An appointment to meet at a certain date and time, especially one made somewhat secretly by lovers
late 14c., from O.Fr. tristre “appointed station in hunting,” possibly from a Scand. source (cf. O.N. treysta “to trust;” see trust)
His bird ambassadors go first astray and notify Hina, but finally the tryst is arranged, the bridal cortege arrives in state, and the bridal takes place.
—The Hawaiian Romance Of Laieikawai
Y: Moses said: “Your tryst is the Day of the Festival, and let the people be assembled when the sun is well up.”
—Three Translations of The Koran (Al-Quran) side by side
They stay late together, and the evidence of their tryst is there in the morning.