aster /ˈæs.tə(ɹ)/ noun3 •Any of several plants of the genus Aster; one of its flowers.On a sunny September morning, with the trees still green, but the asters and fleabanes already taking over in ditch and dalk, Van set out for Ladoga, N.A. — 1969 •A star-shaped structure formed during the mitosis of a cell. •(no longer used) A star.by the changes and enter-caprings of which, the revolutions, motions, cadences, and carrols of the asters [translating astres] and planets are caused and transported. — 2006 formsasters