What is Freeroll in Poker?

Freeroll can mean:

1. A tournament that has no required entry fee or buy-in, while also still offering a real-money prize pool. 

2. A hand in which a player is guaranteed to at least split the pot with his/her opponent, with a chance to win the pot outright. For example, if you have A♠ A♣ and your opponent has A♥ A♦, and the board comes 8♠9♠2♦Q♠, you’re freerolling the ability to win the whole pot with a made flush if a spade hits on the river.