Probably is defined as very likely.
An example of probably is what you say when asked to go to dinner when you're 99% sure you can make it.
Most likely; presumably.
(comparative more probably, superlative most probably)
- In all likelihood.
From probable +"Ž -ly.
- She was probably right.
- He would probably know the fastest way.
- He probably didn't even realize what he said.
- I probably wouldn't have known the difference, though.
- He was alright and they probably wouldn't do it again.