from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Not to be dispensed with; essential.
- adj. Obligatory; unavoidable: the routine but indispensable ceremonies of state.
- n. One that is indispensable.
from the GNU version of the Collaborative International Dictionary of English
- adj. Not dispensable; impossible to be omitted, remitted, or spared; absolutely necessary or requisite.
- adj. Not admitting dispensation; not subject to release or exemption.
- adj. Unavoidable; inevitable.
from The Century Dictionary and Cyclopedia
- Not to be set aside, evaded, or escaped; inevitable.
- Not to be dispensed with; not to be omitted or spared; absolutely necessary or requisite.
- Not permissible by dispensation or license; incapable of being legalized.
- n. An indispensable person or thing.
- n. Specifically, trousers.
- n. A bag or pocket, frequently of silk and much decorated, worn by women in the first years of the nineteenth century, on the outside of the gown, instead of inside, as an ordinary pocket would be.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. absolutely necessary; vitally necessary
- adj. not to be dispensed with; essential
- adj. unavoidable
From Medieval Latin indispensabilis, corresponding to in- + dispensable. Compare French indispensable. (Wiktionary)