Entry 2 senses Webster, 1913 Accouplement /(-kŭp"'l*ment)/ · Ac·cou·ple·ment · IPA /əˈkʌpəlmənt/ 01 n. The act of coupling, or the state of being coupled; union. 1. The act of coupling, or the state of being coupled; union.[R.] 2. That which couples, as a tie or brace.[R.]