inst uncommon adjective 1. in or of the present month “your letter of the 10th inst” Synonymsinstant Similarpresent Related words Word family insteadinstrumentinstantinstallinstitutioninstanceinstructinstructioninstantlyinstituteinstallationinstalinstructorinstinctinstrumentationinstitutional WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.