Hypertext Webster Gateway: "sustainable"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Sustainable \Sus*tain"a*ble\, a. [Cf. F. soutenable, OF.
soustenable.]
Capable of being sustained or maintained; as, the action is
not sustainable.
From WordNet (r) 1.7 (wn)
sustainable
adj : capable of being sustained
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