Questions about example sentences with, and the definition and usage of "Hour"

A: the third hour

A: A normal work day is usually 8 hours long. It lasts from 9am in the morning until 5pm in the afternoon.
They are saying that the first hour, which is from 9am to 10am seems to go by fast. But the other seven hours, which are from 10am to 5pm seem to go by very, very slowly.

They used the word "second" because they split the 8 hours into two pieces.
Like this: 1........2345678
1 goes by fast.
2345678 goes by really slowly.

A: it means that "i will be in that area for 1 hour,so if you want to call me..call me in the 1 hour period"

A: It will not happen until an hour (60 minutes) has passed

A: We are here for the whole hour. You have our undivided attention or participation for the whole hour.

A: It is more natural to say “almost an hour” than “as much as an hour”.

Examples:
“I was waiting for almost an hour at the front desk.”
“My food took almost an hour to arrive.”
“I exercised for almost an hour before I got tired.”

You can also say “about an hour” in the same way as above.

A: I think either:
I experienced a 5-hour-long game where only endurance mattered.
Or:
I experienced 5-hour-long games where only endurance mattered.
sounds more natural :)
Some people might leave the hyphens out but I think it’s correct in this case to use hyphens.

A: I'll see you in an hour.

He came to the office an hour later.

The process will take an hour to finish.

A: It has not stopped raining for the past three hours.

A: tonight I'm gonna try to go to bed at a normal hour instead of my usual 02:00

A: In this context both would sound equally natural. I personally use “in an hour” but I wouldn’t think any differently if someone used “after an hour”

... also, “after an hour” is shortened from “after an hour has passed” or “after an hour or so” ... so it could be interpreted as a more loose definition of time. The first phrase “in an hour” tells the other person “meet me here in exactly one hour”. The second phrase could possibly imply “to meet me here after one full hour has passed (at least)” but can leave the implied statement open-ended and potentially mean longer than one hour.

A: They are the same thing but “we only have an hour left” is more natural to say and common to hear

A: "hour" is what you can count.
e.g.
1hour, 2hours...

"o'clock" is used to tell a pinpoint time.

A: "An hour" is correct because "h" isn't pronounced.

A: "In an hour" means an event happened within a span of one hour and "after an hour" means someone's supposed to do something after an hour passed. For example, "You should be here in an hour" meaning, if I told you that at 13:00, you should be here before 14:00. " Let's meet here after an hour" meaning, if I said that to you at 13:00, we should meet exactly or after 14:00.

A: Had been waiting

A: An hour isn’t long enough for our class.

A: I try to walk for at least an hour so I won't be depressed.
or
I try to walk for about an hour or more so I won't be depressed.

A: Hello, I would say, “In an hour we’re going to play football”
You could also say:
“An hour from now/in an hour, we will be playing football.”( But if you say this, the meaning changes slightly)

A: I would say "two and a half hours".

A: I usually get in an hour of work/study during lunchtime.

A: × I spent an hour a day playing video games, but I will spend only 30 minutes a day from now on.
✓ I've been spending an hour a day playing video games, but I will spend only 30 minutes a day from now on.

A: × But even though I spend an hour a day searching, I can't find the book.
✓ But even though I spent an hour today searching, I can't find the book.

"an hour a day" is a phrase that means "one hour every day" or "one hour per day".

It might mean you have searched for the book for the past 5 days, for one hour on each day.

So the sentence seems strange, unless this is exactly what you mean.

A: It’s the time around dusk or sunset where the light is bluish.

A: This is correct.
But this is more natural:
We got here in one hour on the bus.