What does nonempty mean?
Nonempty means that something contains at least one element, occupant, or unit rather than being empty. The term is especially common in mathematics and computing: a nonempty set has one or more members, while a nonempty field contains elements other than its zero element. It can also describe containers, lists, strings, forms, or datasets in which there is some recorded content. Although “not empty” is an equivalent paraphrase, “nonempty” is more concise and sounds more technical. In everyday speech, “full” or “occupied” may convey a similar idea, but nonempty is especially useful when the presence of at least one item matters rather than how completely the space is filled. The word is also frequently contrasted with “empty” when classifying data or mathematical objects.
adjectiveContaining something rather than being empty; having at least one element, occupant, or unit.
- Containing something rather than being empty.
- Denoting a collection, set, field, or other mathematical structure with at least one member or nonzero value.
"The researcher selected only nonempty cells for further analysis."
"Only nonempty feedback forms were included in the dataset."
"The theorem requires every nonempty subset to contain two elements with the same sum."
Nonempty turns a simple question into a mathematical guarantee: there is at least something inside.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does nonempty come from?
Nonempty was formed in English by combining the Latin-derived prefix non-, meaning “not,” with the adjective empty. Empty itself descends from Old English ēmettig, whereas the unrelated Latin words vacate, vacuous, and vacuum derive from Latin vacare, “to be empty.” These Latin cognates express a broader concept of emptiness or absence rather than the English compound’s precise negation of the empty.
How nonempty is actually used
The closed form “nonempty” is standard in technical and mathematical writing, although “non-empty” with a hyphen is also common. The word is formal and most frequently used in mathematics, computing, data analysis, and technical specifications.