In grammar, a conjunction is a word like "and" or "but" that connects words or parts of sentences. More generally, it means an event where things happen together or are joined.
From Latin *coniunctio*, from *coniungere* "to join together" (*con-* "together" + *iungere* "to join"). It has long been used in grammar, logic, and astronomy.
The tiny word "and" is doing heavy lifting: it’s a conjunction gluing ideas together. Astronomers also talk about a "planetary conjunction" when planets line up—grammar and space sharing the same joining idea.
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