…a word used to connect clauses or sentences or to coordinate words in the same clause (e.g. and, but, if)…
…a conjunction of Mercury or Venus with the sun, in which the planet and the earth are on the same side of the sun…
…a conjunction of Mercury or Venus with the sun, when the planet and the earth are on opposite sides of the sun…
…a conjunction placed between words, phrases, clauses, or sentences of equal rank, e.g. and, but, or…
…a conjunction that introduces a subordinating clause, e.g. although, because…
