| \suh-RAN\ | noun 1. Meteorology. fine rain falling after sunset from a sky in which no clouds are visible. | | Quotes | The sky was clear, but a serein drizzled onto them. -- China Miéville, Iron Council, 2004 | | Origin | | Serein is a French loanword with roots in the Latin term sērus meaning "late." It entered English in the mid-1800s. | |