1. a conceptual separation or distinction; - Example: "there is a narrow line between sanity and insanity" [syn: line, dividing line, demarcation, contrast]
WordNet (r) 3.0 (2006):
dividing line
n 1: a conceptual separation or distinction; "there is a narrow
line between sanity and insanity" [syn: line, dividing
line, demarcation, contrast]