all day

Adverb

all day (not comparable)

1. 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.1802, Robert Southey, The Inchcape Rock
2. (figuratively) Easily; handily; in spades; by far.
   • Well, for twenty quid we're having it — it's worth that all day long.
3. (slang) In total.
   • Table 2 needs three tacos, and Table 4 needs six, so that's nine tacos, all day.