1. undefinable - Noun
2. undefinable - Adjective
3. undefinable - Adjective Satellite
not capable of being precisely or readily described; not easily put into words
Source: WordNetIt is impossible to communicate to people who have not experienced it the undefinable menace of total rationalism. Czesław Miłosz
God remains a viable hypothesis as the prime mover, however undefinable and untestable that conception may be. E. O. Wilson
We obtain the concept, as we do the form, by overlooking what is individual and actual; whereas nature is acquainted with no forms and no concepts, and likewise with no species, but only with an X which remains inaccessible and undefinable for us. Friedrich Nietzsche
Their avowedly undefinable position, if it be not capable of logical characterisation, seems to me to be characterised by an angry hatred of strict logic, and even some disposition to rate any exact thought which interferes with their doctrines as all humbug. Charles Sanders Peirce
I am undefinable. I don't fit into any particular category. Rufus Wainwright
an indefinable feeling of terror Source: Internet