Adjective has 2 senses

• ad hoc(s = adj.all) - often improvised or impromptu; "an ad hoc committee meeting"


• ad hoc(s = adj.all) - for or concerned with one specific purpose; "a coordinated policy instead of ad hoc decisions"

Adverbial has 1 sense

• ad hoc(r = adv.all) - for one specific case; "they were appointed ad hoc"