Good was almost certainly one of the first words you learned in English, and you've probably learned other words with a similar meaning: nice, lovely and great; fantastic, wonderful, fabulous and amazing (all mean "extremely good"); and awesome (an informal way to say "extremely good").
The word good is also used in a lot of common phrases and expressions. For example, if you haven't seen a friend for a long time, you could say Good to see you:
- Good to see you again. How are you?
If you do something well, you're good at it:
- I'm very good at running.
If something is likely or probable, you can say there's a good chance (+ that or of):
- There's a good chance (that) they never saw your e-mail.
- He's got a good chance of passing the exam.
To express relief, you can say It's a good thing (that)…:
- It's a good thing (that) we didn't go for a walk. There's a huge thunderstorm coming!
If you arrive in good time, you're early enough:
- Let's get to the airport in good time so that we can go shopping.
Healthy food or a healthy lifestyle is good for you or does you good:
- It'll do you good to go for a walk with the dog. (= You'll feel better afterwards.)
- Sitting in front of a computer all day isn't very good for you.
The phrase a good deal can mean "much" or "a lot":
- She travels abroad a good deal.
- My new rucksack is a good deal lighter than the old one.
And a good many means quite a lot (and more than expected):
- We had a good many apples on our tree this year.