sustain /səˈsteɪn/verb 9noun 2forms 5 verb9 •To maintain, or keep in existence.The professor had trouble sustaining students’ interest until the end of her lectures.The city came under sustained attack by enemy forces. •To experience or suffer (an injury, etc.).The building sustained major damage in the earthquake. •To confirm, prove, or corroborate; to uphold.After the vote is taken, the Chairman states that the decision of the Chair is sustained, or reversed, as the case may be. — 1876 •To allow, accept, or admit (e.g. an objection or motion) as valid. •To provide for or nourish.Yea, forty years didst thou sustain them in the wilderness, so that they lacked nothing; their clothes waxed not old, and their feet swelled not. — 1611 •To keep from falling; to bear; to uphold; to support.A foundation sustains the superstructure; an animal sustains a load; a rope sustains a weight. •To be a long-lasting sound.I like how long that drum sustains. •To encourage or sanction (something). •To aid, comfort, or relieve; to vindicate.His Sons, who seek the Tyrant to sustain, And long for Arbitrary Lords again, — 1697 noun2 •A mechanism which can be used to hold a note, as the right pedal on a piano.To call this music bland is to ignore the down-the-drain vocal fade-aways, the extended sax sustains […] — 2011 •Clipping of sustainability. formssustained · sustaining · sustaineth · sustains · sustainest