Meaning of "Whole Day"

The phrase "whole day" refers to the entire duration of a day , typically from the beginning of the day (midnight or early morning) until the end of the day (nighttime or midnight). It implies the full 24 hours or the complete span of daylight hours, depending on the context.

Examples:

• "I spent the whole day at the beach."
  (Meaning: The entire day was spent at the beach, from morning to evening.)

• "She worked the whole day without a break."
  (Meaning: She worked continuously throughout the day.)

If you want a more specific or nuanced explanation, feel free to ask!