What does probability mean?

Say a coin has a 90-10% chance of getting heads or tails. I, knowing this, would of course choose heads before a toss. But why? It can still be a tails, why am I inclined to choosing heads then? When I ask that to myself, my mind says "because of course heads has a 90% chance of being the result".

The problem I face is that, in order to explain the concept of "chance" to myself, I have to use that very concept.

Even if I think of a number of tosses, say 100. Having a 90-10 possibility doesn't guarantee that there will be 90 heads and 10 tails. It can still be 100 tails. Heads are just more probable, but then what does being more probable even mean?

Is it possible to get an intuition of chances?