Anomalous

[ uh-nom-uh-luh s ]

adjective

  1. deviating from what is standard, normal, or expected.

Examples of anomalous in a sentence:

  • There was an anomalous storm hanging over the city that no one could explain, as it had seemingly appeared out of nowhere on a sunny day.
  • Being struck by lightning is actually a rather anomalous event, since the chances of being struck by lightning are so astronomically low.