Latin speakers modified lacus into lacuna to form a word meaning “pit,” “gap,” or “pool.” When English speakers borrowed the term in the 17th century, they used it to refer to a figurative gap in or missing …

LACUNA definition: a gap or missing part, as in a manuscript, series, or logical argument; hiatus. See examples of lacuna used in a sentence.

If you say that there is a lacuna in something such as a document or a person's argument, you mean that it does not deal with an important issue and is therefore not effective or convincing.

Feb 25, 2026 · lacuna (plural lacunae or (obsolete) lacunæ or lacunas) (microscopy) A space visible between cells, allowing free passage of light. "Our young friend makes up for many obvious mental …

LACUNA definition: 1. an absent part, especially in a book or other piece of writing 2. an absent part, especially in…. Learn more.

pl. la·cu·nae or la·cu·nas 1. An empty space or a missing part; a gap: "self-centered in opinion, with curious lacunae of astounding ignorance" .

Definition of lacuna noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Lacuna definition: An empty space or a missing part; a gap.

A lacuna is a gap or missing part in something, such as a manuscript, series, or logical argument. It can also refer to an unfilled space or interval or a cavity or depression, especially in bone. In a …

A lacuna is a gap or missing part. If you complain that there's a major lacuna in the bake sale, the lack of brownies is probably to blame.