Definitions of easterly:

• noun:   a wind from the east
• adjective:   from the east; used especially of winds

  Example: "The winds are easterly"

• adjective:   lying in or toward the east
• adverb:   from the east

  Example: "The winds blew easterly all night"

• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #12647)