Source : WordNet®

runaway robin
     n : trailing European aromatic plant of the mint family having
         rounded leaves and small purplish flowers often grown in
         hanging baskets; naturalized in North America; sometimes
         placed in genus Nepeta [syn: {ground ivy}, {alehoof}, {field
         balm}, {gill-over-the-ground}, {Glechoma hederaceae}, {Nepeta
         hederaceae}]