Union; connection; the state of being seen in the same part of the heavens; a connecting word.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (noun) (n.) (noun)
Union; association; connection; the apparent meeting of two or more stars or planets; a word used to connect sentences or words.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)
Union; connection; in astron., the meeting of two or more planets in the same part of the heavens, or in the direct line of the eye, as the moon with the sun at new moon; in gram., a joining or connecting word.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
Connection, union: ( gram.) a word that connects sentences, clauses, and words.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
Act of joining; connection; union; part of speech that connects words and clauses.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (noun) (n.) (noun)

Usage examples:

And last night it was in conjunction with the red star, Mars.
- The Dark Star by Robert W. Chambers
" Yes, I do feel like a female jaguar," I answered hotly and then collapsed inside at the use of that name for myself in conjunction with my secret title for the Reverend Mr. Goodloe.
- The Heart's Kingdom by Maria Thompson Daviess
If now the Polish forces are in Ukraine and the population does not oppose them, it is because the Poles are acting in conjunction with the Ukrainian forces under Petlura, as their allies.
- Memorandum to the Government of the United States on the Recognition of the Ukrainian People's Republic by Julian Batchinsky