I. (ˈ)adˈhäk, -ōk also (ˈ)äd- adverb
Etymology: New Latin, literally, for this
: for the particular end or purpose at hand and without reference to wider application or employment
a special member appointed ad hoc according to the problem being considered
II. (ˈ) ̷ ̷| ̷ ̷ adjective
: made, established, acting, or concerned with a particular end or purpose
a coordinated policy instead of ad hoc decisions
an ad hoc commission of inquiry