From Longman Dictionary of Contemporary Englishivyi‧vy /ˈaɪvi/ noun (plural ivies) [countable, uncountable] 
HBPDLGa climbing plant with dark green shiny leaves → poison ivy
HBPDLGa climbing plant with dark green shiny leaves → poison ivyExamples from the Corpus
ivy• Iron gates open to a courtyard filled with pots of geraniums and ivy tucked next to rusted bistro tables and chairs.• I remember a fine round tower covered in ivy.• But to the right of the window he'd opened he found an old ivy creeper clawed to the brickwork.• Garnish with a fruit and a sprig of poison ivy.• Above the sink, ivy had burrowed its way through the walls and was now spreading in profusion towards the ceiling.• In the woodland or amongst the ivy, grey squirrels are often found.• Like much of the ivy in the garden they once inhabited window boxes.• Is the house made of wood or stone, and is it covered with ivy?Origin ivy Old English ifig 