What does a trilogy mean? They are saying GOW is going to be a trilogy?

What does trilogy mean? They say gears of war is going to be a trilogy series.What does a trilogy mean? They are saying GOW is going to be a trilogy?
it means a group of three. Gears of War is going to have 3 games, hence trilogy. Btw, GOW is a great series of games. For reference anything with the prefix tri means three, hence tricycle has three wheels and the dinosaur triceratops has three horns.What does a trilogy mean? They are saying GOW is going to be a trilogy?
Trilogy stems from 'Tri'; which means three. A trilogy in gaming is a three-part story that is told over three different games. Gears one and two are the first 2 parts so a GoW 3 is on the way.
It means that it's going to be a three part series. For example, the two trilogies of Star Wars, and the trilogy of The Lord of the Rings.
Tri means 3. They can mean there is a 3rd installment in the game. Then again trilogy means a series of games movies etc.