Waza-Minooo44 said:in⋅fin⋅i⋅ty  [in-fin-i-tee]
-noun, plural -ties.
1. the quality or state of being infinite.
2. something that is infinite.
3. infinite space, time, or quantity.
4. an infinite extent, amount, or number.
Infinity works for the quantity of something, but not for that something to be infinite.
For example, you can have an infinite amount of space, but space cannot be infinite. Just like you can have an infinite amount of matter, but matter cannot be infinite. Their can be an infinite amount of time, but time cannot be infinite.