Two definitions–
"In Dante's Inferno the Harrowing of Hell is mentioned in Canto IV by the pilgrim's guide Virgil." —Wikipedia
"The Easter Vigil…. is held in the hours of darkness between sunset on Holy Saturday and sunrise on Easter Day." —Wikipedia
Two more, of acronyms coined by Philip Rieff—
"Rieff is critical of the present 'pop' culture that glories in the 'primacies of possibility' and prefers 'both/and' to 'either/or.' … the 'via'— the 'vertical in authority'—… teaches us our place as we assent to and ascend on via’s ladder." —Philip Manning
Related material:
The infinity symbol, as sketched in a touching
attempt at scholarship by the late
"both/and" novelist David Foster Wallace—
Lemniscate with Cartesian cross—