What does incomplete mean?
Incomplete describes something that is not whole, finished, or fully developed. It commonly refers to missing information or details, as in incomplete records or an incomplete report, and it can also describe work that has not been completed. The word is useful because it identifies not merely something that is imperfect, but something specifically lacking a required part or stage. In professional, academic, and legal contexts, it often signals that available information is insufficient to reach a complete conclusion. Although sometimes used interchangeably with unfinished, incomplete more strongly emphasizes an absent element or unresolved gap, whereas unfinished focuses on the process not yet being complete.
adjectiveNot complete or whole; lacking some necessary part, detail, or conclusion. It may also mean unfinished or not yet fully accomplished.
- Not whole or lacking one or more necessary parts.
- Not finished or fully completed.
"The report was incomplete because several important documents were missing."
"The witnesses gave incomplete accounts of the accident."
"Construction remained incomplete until the final inspection."
A single missing detail can make an otherwise complete idea incomplete, which is why the word is essential for describing gaps, unfinished work, and incomplete information.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does incomplete come from?
The word was formed in English by combining the prefix in- with complete, meaning not complete. The adjective complete comes through Latin from complere, “to fill up” or “make full,” and its opposite incomplete has followed the same pattern as many English negative adjectives formed with in-. Completion, completely, and completeness continue the same Latin-root family.
Related word forms
How incomplete is actually used
Common in formal, professional, and academic contexts as well as everyday speech. It is usually followed by a noun such as information, record, or picture, but can also occur after a linking verb: The collection is incomplete.