unsafe adj 1: lacking in security or safety; "his fortune was increasingly insecure"; "an insecure future" [syn: {insecure}, {unsafe}] [ant: {secure}] 2: involving or causing danger or risk; liable to hurt or harm; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions" [syn: {dangerous}, {unsafe}] [ant: {safe}] 3: not safe from attack [syn: {insecure}, {unsafe}]