1. adj. Having much distance from one terminating point on an object or an area to another terminating point (usually applies to horizontal dimensions; see Usage Notes below).
It's a long way from the Earth to the Moon.
2. adj. Having great duration.
The pyramids of Egypt have been around for a long time.
3. adj. Seemingly lasting a lot of time, because it is boring or tedious or tiring.
Example Sentences
That's how long it takes to go away.
How long have you been teaching?
How long have you been dating?
How long do you plan to string that one along before you hurt her?
How long are we going to be detained.