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[Latin, In the meantime.] An officer ad interim is a person appointed to fill a position that is temporarily open, or to perform the functions of a particular position during the absence or temporary incapacity of the individual who regularly fulfills those duties.
ad interimadverb at the same time, during, during the interval, en attendant, for a time, for the time being, in the course of, in the interim, in the intervening time, in the meantime, in the meanwhile, meantime, meanwhile, throughout, till, until, when, while
Associated concepts: ad interim copyright, ad interim reetraining order
AD INTERIM. In the mean time. An officer is sometimes appointed ad interim, when the principal officer is absent, or for some cause incapable of acting for the time.