The difference between Abnormal and Unusual

When used as nouns, abnormal means a person or object that is not normal, whereas unusual means something that is unusual.

When used as adjectives, abnormal means not conforming to rule or system, whereas unusual means unlike what is expected.

check bellow for the other definitions of Abnormal and Unusual

  1. Abnormal as an adjective:

    Not conforming to rule or system; deviating from the usual or normal type.

  2. Abnormal as an adjective:

    Of or pertaining to that which is irregular, in particular, behaviour that deviates from norms of social propriety or accepted standards of mental health.

  1. Abnormal as a noun:

    A person or object that is not normal.

  1. Unusual as an adjective:

    Unlike what is expected; differing in some way from the norm.


    "His behavior was unusual in that it was considered childish for a man of his age."

  2. Unusual as an adjective:

    Not usual.

  1. Unusual as a noun:

    Something that is unusual; an anomaly.