[going to] Can be expected to; planning to. — Used after "is" (or "was", etc.), with an infinitive, in the same way "will" is used, to show future.
* /Some day that big tree is going to rot and fall./* /Look at those dark clouds. It's going to rain./* /The boys are going to practice football this afternoon./* /For a minute Ben thought the car was going to hit him./* /I was going to attend the meeting, but after supper I forgot about it./
- Sometimes used without the infinitive.
* /That worn rope hasn't broken yet, but it's going to./* /"Put some more wood on the fire." — "I'm going to."/ Compare: ABOUT TO(1).