nightlong

[ adjective nahyt-lawng, -long; adverb nahyt-lawng, -long ]
/ adjective ˈnaɪtˌlɔŋ, -ˌlɒŋ; adverb ˈnaɪtˈlɔŋ, -ˈlɒŋ /

adjective

lasting all night: a nightlong snowfall.

adverb

through the entire night: They typed nightlong to finish the reports.

Origin of nightlong

before 1000; Middle English; Old English nihtlang (adv.) for the space of a night. See night, long1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for nightlong

British Dictionary definitions for nightlong

nightlong

/ (ˈnaɪtˌlɒŋ) /

adjective, adverb

throughout the night
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012