septimate /ˈsɛptɪmeɪt/adjective 1noun 1verb 1forms 3 adjective1 •(rare) In groups of seven. noun1 •A group of seven.In the 744 septimates of January there are only seven in which all the W and S are positive; in the 720 of June there are none. — 1876 verb1 •Submit (someone or something) to septimation; reduce by one seventh.We may say, without the least hyperbole, nature septimates; art centesimates us. — 1755 formsseptimated · septimating · septimates