sustainer

sus·tain  (s-stn)

tr.v. sus·tained, sus·tain·ing, sus·tains

1. To keep in existence; maintain.

2. To supply with necessities or nourishment; provide for.

3. To support from below; keep from falling or sinking; prop.

4. To support the spirits, vitality, or resolution of; encourage.

5. To bear up under; withstand: can't sustain the blistering heat.

6. To experience or suffer: sustained a fatal injury.

7. To affirm the validity of: The judge has sustained the prosecutor's objection.

8. To prove or corroborate; confirm.

9. To keep up (a joke or assumed role, for example) competently.

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[Middle English sustenen, from Old French sustenir, from Latin sustinre : sub-, from below; see sub- + tenre, to hold; see ten- in Indo-European roots.]

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sus·taina·bili·ty n.

sus·taina·ble adj.

sus·tainer n.

sus·tainment n.

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sustainer [səˈsteɪnə]

n

(Astronautics) a rocket engine that maintains the velocity of a space vehicle after the booster has been jettisoned

Thesaurus

Noun

1.

sustainer - someone who upholds or maintains; "firm upholders of tradition"; "they are sustainers of the idea of democracy" maintainer, upholder admirer, booster, protagonist, supporter, champion, friend - a person who backs a politician or a team etc.; "all their supporters came out for the game"; "they are friends of the library"