Maybe vs. Probably

Maybe

adverb

written as one word, defined as possibly or perhaps.

used to indicate uncertainty or possibility.

• Maybe it won't rain.
• Maybe no one will come to the party.
• Maybe you were right after all.

Probably
adverb

used to mean that something is very likely

• Sam was probably right.
• I'll probably be home by midnight.
• The infection was probably caused by swimming in contaminated water.