I. noun 1. something that deviates from what is standard, normal, or expected • there are a number of anomalies in the present system
• [with clause]
the apparent anomaly that those who produced the wealth were the poorest
• [ mass noun]
the position abounds in anomaly.
[Astronomy] the angular distance of a planet or satellite from its last perihelion or perigee.
– origin late 16th cent.: via Latin from Greek anōmalia, from anōmalos (see anomalous).