- Not likely to please; objectionable: undesirable intrusions.
- Not wanted: undesirable aliens.
(comparative more undesirable, superlative most undesirable)
- Nouns to which "undesirable" is often applied: effect, consequence, result, element, change, person, substance, characteristic, quality, feature, behavior, activity, thing, event, reaction, state.
- an undesirable person
un- +"Ž desirable