(also non compos)
Definition of non compos mentis in English:
Not sane or in one’s right mind.
- There is nothing you can do without her consent - unless you were to challenge her mental capacity and prevail - so you have to respect her decision; either that or you must have her declared non compos.
- He's had them ever since you were declared non compos.
- Look, you are not the arbiter of what is or is not ‘pro-American’, you are just another rightist flamer who is non compos mentos.
Latin, literally 'not having control of one's mind'.
Definition of non compos mentis in:
- British & World English dictionary