Jastrow: חֵירוּם

חֵירוּם m. (חָרַם) exclusion, disassociation, esp. interdiction of travel between two countries at war with each other. B. Bath. 38ᵃ בשעת ח׳ at a time when commercial intercourse was cut off. Ib. 38ᵇ יהודה … ח׳ דמו Judaea and Galilee are generally to be considered as if in a state of interdiction (possession in one country is no valid claim when the owner lived in the other); Y. ib. III, 14ᵃ top.