The Collaborative International Dictionary of English v.0.48:

Northerly \North"er*ly\, a.
   Of or pertaining to the north; toward the north, or from the
   north; northern.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Northerly \North"er*ly\, adv.
   Toward the north.
   [1913 Webster]

WordNet (r) 3.0 (2006):

northerly
    adv 1: in a northern direction; "they earn more up north";
           "Let's go north!" [syn: north, northerly,
           northwards, northward]
    adj 1: situated in or oriented toward the north; "the northern
           suburbs"; "going in a northerly direction" [syn:
           northerly, northern]
    2: coming from the north; used especially of wind; "the north
       wind doth blow"; "a northern snowstorm"; "the winds are
       northerly" [syn: northerly, northern]
    n 1: a wind that blows from the north [syn: north wind,
         northerly, norther, boreas]