Hypertext Webster Gateway: "indispensable"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Indispensable \In`dis*pen"sa*ble\, a. [Pref. in- not +
dispensable: cf. F. indispensable.]
1. Not dispensable; impossible to be omitted, remitted, or
spared; absolutely necessary or requisite.
2. (Eccl.) Not admitting dispensation; not subject to release
or exemption. [R.]
The law was moral and indispensable. --Bp. Burnet.
3. Unavoidable; inevitable. [Obs.] --Fuller.
From WordNet (r) 1.7 (wn)
indispensable
adj 1: not to be dispensed with; essential; "foods indispensable to
good nutrition" [ant: {dispensable}]
2: absolutely necessary; vitally necessary; "essential tools
and materials"; "funds essential to the completion of the
project"; "an indispensable worker" [syn: {essential}]
3: unavoidable; "the routine but indispensable ceremonies of
state"
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