The Collaborative International Dictionary of English v.0.48:

Northeast \North`east"\, n.
   The point between the north and east, at an equal distance
   from each; the northeast part or region.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Northeast \North`east"\, a.
   Of or pertaining to the northeast; proceeding toward the
   northeast, or coming from that point; as, a northeast course;
   a northeast wind.
   [1913 Webster]

   Northeast passage, a passage or communication by sea
      between the Atlantic and Pacific oceans along the north
      coast of Asia.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Northeast \North`east"\, adv.
   Toward the northeast.
   [1913 Webster]

WordNet (r) 3.0 (2006):

northeast
    adv 1: to, toward, or in the northeast [syn: northeast,
           north-east, nor'-east]
    adj 1: situated in or oriented toward the northeast; "the
           northeasterly part of the island" [syn: northeastern,
           northeasterly, northeast]
    2: coming from the northeast; "northeasterly winds" [syn:
       northeasterly, northeast]
    n 1: the compass point midway between north and east; at 45
         degrees [syn: northeast, nor'-east, northeastward,
         NE]
    2: the northeastern region of the United States [syn:
       Northeast, northeastern United States]
    3: the direction corresponding to the northeastward compass
       point
    4: a location in the northeastern part of a country, region, or
       city