▪ a limit of a subject or sphere of activity:"a community without class or political boundaries"Similardividing linedividedivisionborderlinedemarcation lineline of demarcationcutoff pointthresholdlimitsparametersboundsouter limitsconfinesextremitiesbarriersthresholdsambitcompass
Word Originearly 17th century: variant of dialect bounder, from bound2 + -er1, perhaps on the pattern of limitary.