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
Intelligence is only so good for so long.
But when the labour began it was so long that I had to be taken to hospital.
We've forgotten why we ruled the world for so long.
I'm sure it's just the flu or something from being down here for so long.
Our people shall not perish so long as we remain strong!