B1
big enough or large enough in number or amount, although not big or not many
Dictionary examples:
There's a reasonable chance I'll finish my homework. If the teacher extends the deadline by a year! (0.0)
I saved a reasonable amount of money this month. Enough for one candy bar! (0.0)
My sandwich had a reasonable amount of cheese. It wasn't a cheese mountain! (0.0)
We have a reasonable chance of winning the game. (22.3)
It's a reasonable salary for that job. (23.1)
There were a reasonable number of people there. (25.2)