<p><strong>Adjective</strong></p><ul><li>having or forming a boundary or barrier: He was blocked by a closed door.</li><li>brought to a close; concluded: It was a closed incident with no repercussions.</li><li>not public; restricted; exclusive: a closed meeting; a closed bid at a private auction.</li><li>not open to new ideas or arguments.</li><li>self-contained; independent or self-sufficient: a closed, symbiotic relationship.</li><li>Phonetics: (of a syllable) ending with a consonant or a consonant cluster, as has, hasp.</li><li>Linguistics: (of a class of items) limited in membership and not readily expanded to include new items, as the class of inflectional affixes, articles, pronouns, or auxiliaries.</li><li>Hunting, Angling: restricted as to the kind of game that may be legally taken and as to where or when it may be taken: woods closed to deer hunters.</li><li>Mathematics: (of a set in which a combining operation between members of the set is defined) such that performing the operation between members of the set produces a member of the set, as multiplication in the set of integers.</li><li>(of an interval) containing both of its endpoints.</li><li>(of a map from one topological space to another) having the property that the image of a closed set is a closed set.</li><li>(of a curve) not having endpoints; enclosing an area.</li><li>(of a surface) enclosing a volume.</li><li>(of a function or operator) having as its graph a closed set.</li></ul>