Main entry: unnatural, abnormal
Definition: not normal; not typical or usual or regular or conforming to a norm
Usage: abnormal powers of concentration; abnormal amounts of rain; abnormal circumstances; an abnormal interest in food
Antonyms: normal
Definition: conforming with or constituting a norm or standard or level or type or social norm; not abnormal
Antonyms: regular
Definition: in accordance with fixed order or procedure or principle
Antonyms: regular
Definition: (of solids) having clear dimensions that can be measured; volume can be determined with a suitable geometric formula
Antonyms: regular
Definition: (used of the military) belonging to or engaged in by legitimate army forces
Antonyms: conform
Definition: be similar, be in line with
Antonyms: typical
Definition: exhibiting the qualities or characteristics that identify a group or kind or category
Main entry: abnormal
Definition: departing from the normal in e.g. intelligence and development
Usage: they were heartbroken when they learned their child was abnormal; an abnormal personality
Antonyms: normal
Definition: being approximately average or within certain limits in e.g. intelligence and development
Main entry: abnormal
Definition: much greater than the normal
Usage: abnormal profits; abnormal ambition
Antonyms: moderate
Definition: being within reasonable or average limits; not excessive or extreme