Boost your vocab and unleash your potential!

Recently viewed words:
Definitions of roller coaster
  1. noun
    elevated railway in an amusement park (usually with sharp curves and steep inclines)
  2. noun
    anything characterized by abrupt and extreme changes (especially up and down)
    "the economy has been on a roller coaster all year"
Explanation of roller coaster
My lists:
Recently viewed words: