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

In any case, the daylong cruise served its purpose of resetting the week and reconnecting the friends.

From Los Angeles Times ● Aug. 13, 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

Ernest’s response contrasted sharply with that of Compton, who sat for a blistering daylong deposition by the Tribune’s lawyers without wavering for a moment in his defense of Kamen.

From "Big Science" by Michael Hiltzik

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