The state of being singular, distinct, peculiar, uncommon or unusual.
An unusual action or behaviour.
A point where all parallel lines meet.
Celibacy, singleness (as contrasted with marriage).
A point where a measured variable reaches unmeasurable or infinite value.
The value or range of values of a function for which a derivative does not exist.
The state or quality of being unique or one of a kind.
The fact of being united as a whole.