"She was exhausted from a day of playing soccer"
Can someone help me understand the use of" a day"? Does it mean whole day or something else?
A 'day of' something is a day which was wholly or mainly occupied with something. A day of hard work. A day of relaxation. A day of arguments. A day of washing clothes.
The phrase is subjective for most people. It could mean that most of the waking hours of that day were spent doing X, but it could just as easily mean only a few hours.
I detest shopping and being in large crowds. If I have to do it for 2 hours, I'm going home afterward, spend the rest of my day avoiding other people, and if asked I'll probably say, "I spent the day shopping."
Because for me, the act was so emotionally and mentally draining I had to spend the rest of my day recuperating from it. If you hear someone make the statement, you could ask a follow up question, such as, "Really? The WHOLE day?"
And you're likely to find that people will give you a wide range of answers:
"Oh, not really the WHOLE day, but it was the only significant thing we did. Maybe it took up most of the morning."
"Yeah, man. The WHOLE day! We worked pretty much from sun up to sun down."