- any member of a small class of words distinguished in many languages by their function as connectors between words, phrases, clauses, or sentences, as and, because, but, however.
- any other word or expression of similar function, as in any case.
- a compound proposition that is true if and only if all of its component propositions are true.
- the relation among the components of such a proposition, usually expressed by AND or & or ·.
- the coincidence of two or more heavenly bodies at the same celestial longitude.
- the state of two or more such coinciding heavenly bodies.
- conjugated protein,
- conjugation tube,
- conjugative plasmid,
- conjunctival artery,
- conjunctival reflex
Origin of conjunction
- the position of any two bodies that appear to meet, such as two celestial bodies on the celestial sphere
- Also called: solar conjunctionthe position of a planet or the moon when it is in line with the sun as seen from the earth. The inner planets are in inferior conjunction when the planet is between the earth and the sun and in superior conjunction when the sun lies between the earth and the planetCompare opposition (def. 8a)
- the operator that forms a compound sentence from two given sentences, and corresponds to the English and
- a sentence so formed. Usually written p&q, p∧q, or p.q., where p,q are the component sentences, it is true only when both these are true
- the relation between such sentences
late 14c., originally of planets, from Old French conjonction "union, joining, sexual intercourse" (12c.), from Latin coniunctionem (nominative coniunctio), from past participle stem of coniugare "join together" (see conjugal). Cf. Italian congiunzione, Spanish conjunción. Grammatical sense (late 14c.) was in Latin, a loan-translation of Greek syndesmos. The word also had the meaning "sexual union" 17c.-18c.
A word that joins words or groups of words. There are three kinds of conjunctions: coordinating, correlative, and subordinating. Coordinating conjunctions include and, but, or, not, yet, for, and so. Correlative conjunctions include the words in the pairs either/or, both/and, and neither/nor. Subordinating conjunctions begin subordinate clauses (see subordination) and join them to the rest of the sentence: “She didn't learn the real reason until she left the valley.”