Phenomena has been in occasional use as a singular since the early 18th century, as has the plural phenomenas. Our evidence shows that singular phenomena is primarily a speech form used by poets, critics, and professors, among others, but one that sometimes turns up in edited prose.
It is etymologically no more irregular than stamina and agenda, but it has nowhere near the frequency of use that they have, and while they are standard, phenomena is still rather borderline.
Examples of phenomena in a Sentence
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'phenomena.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.