usage: become long or longer; "In Spring, the days lengthen"
Adjective
1. elongated, extended, lengthened, prolonged, long (vs. short)
usage: drawn out or made longer spatially; "Picasso's elongated Don Quixote"; "lengthened skirts are fashionable this year"; "the extended airport runways can accommodate larger planes"; "a prolonged black line across the page"