The Collaborative International Dictionary of English v.0.48:

Neap \Neap\, n.
   A neap tide.
   [1913 Webster]

         High springs and dead neaps.             --Harkwill.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Neap \Neap\, n. [Cf. Neb, Nape.]
   The tongue or pole of a cart or other vehicle drawn by two
   animals. [U.S.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Neap \Neap\ (n[=e]p), a. [As. n[=e]pfl[=o]d neap flood; cf.
   hnipian to bend, incline.]
   Low.
   [1913 Webster]

   Neap tides, the lowest tides of the lunar month, which
      occur in the second and fourth quarters of the moon; --
      opposed to spring tides.
      [1913 Webster]

WordNet (r) 3.0 (2006):

neap
    n 1: a less than average tide occurring at the first and third
         quarters of the moon [syn: neap tide, neap] [ant:
         springtide]