noun pl. infinities -·ties

1. the quality of being infinite
2. anything infinite; endless or unlimited space, time, distance, quantity, etc.
3. an indefinitely large number or amount
4. Geom. an ideal point or location thought of as being infinitely distant from the origin or base point of the space being considered
5. Math. an ideal number thought of as the numerical value of an infinite quantity: symbol, ∞
6. Photog.
   1. a distance so far from a camera that rays of light reflected from a subject there may be regarded as parallel
   2. a setting for such a distance on a focusing scale

Etymology: ME infinite < OFr infinité < L infinitas