sustainer noun4 •A person or thing that sustains.[…] But thy selfe, hast a sustainer bene Of much affliction in my cause: […] — 1611 •A rocket engine that remains with a spacecraft during its ascent after the separation of the booster engines. •(US) A person who makes regular donations, especially to a public radio or television station. •(US, no longer used) A radio program without a commercial sponsor.21st time this year a sponsor gave the nod to a sustainer: from now on Let’s Pretend, a CBS sustainer for 13 years, will pretend for Cream of Wheat. — 1943 formssustainers
