An irrational, or abnormal fixation or preoccupation; an obsession.
Sexual attraction to or arousal at something abnormally sexual or nonsexual, such as an object or a nonsexual part of the body.
Something which is believed to possess, contain, or cause spiritual or magical powers; an amulet or a talisman.
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 of being singular, distinct, peculiar, uncommon or unusual.