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daylong

American

[dey-lawng, -long] / ˈdeɪˌlɔŋ, -ˌlɒŋ /

adjective

during the entire day; lasting all day.

a daylong trip.

daylong British

/ ˈdeɪˌlɒŋ /

adjective

lasting the entire day; all day

"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

Etymology

Origin of daylong

First recorded in 1850–55; day + long ¹

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

daylong

Many parents were initially hesitant to embrace daylong phone bans.

From The Wall Street Journal ● Aug. 29, 2026

The daylong strike at the South Korean automaker, the first since 2016, followed months of failed wage negotiations and a series of partial walkouts.

From The Wall Street Journal ● Aug. 21, 2026

During the daylong test, the astronauts suited up, boarded the SpaceX Dragon spacecraft, performed suit leak checks, and verified seat fit.

From Science Daily ● Feb. 2, 2026

The 2026 Roundtable met on Jan. 5 in New York for a daylong discussion of the investment backdrop and the 11 panelists’ latest picks.

From Barron's ● Jan. 16, 2026

The rocking motion of daylong walking transferred itself to the floor.

From "Atonement" by Ian McEwan

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023