all day
adverb
- throughout the day
- for the length of an entire day
Wiktionary
adv
- For the period of an entire day, or at least during all the daytime of a day.
“There hasn't been a breath of wind all day.”
“So thick a haze o’erspreads the sky, They cannot see the sun on high: The wind hath blown a gale all day; At evening it hath died away.”
- Easily; handily; in spades; by far.
“Well, for twenty quid we're having it — it's worth that all day long.”