\Loo\, n. [For older lanterloo, F. lanturelu, lanturlu, name
of the game; orig., the refrain of a vaudeville.]
(a) An old game played with five, or three, cards dealt to
    each player from a full pack. When five cards are used
    the highest card is the knave of clubs or (if so agreed
    upon) the knave of trumps; -- formerly called
    {lanterloo}.
(b) A modification of the game of ``all fours'' in which the
    players replenish their hands after each round by drawing
    each a card from the pack.
{Loo table}, a round table adapted for a circle of persons
   playing loo.

\Loo\, v. t. [imp. & p. p. {Looed}; p. pr. & vb. n.
{Looing}.]
To beat in the game of loo by winning every trick. [Written
also {lu}.] --Goldsmith.