The Collaborative International Dictionary of English v.0.48:

Maritime \Mar"i*time\ (m[a^]r"[i^]*t[imac]m, formerly
   m[a^]r"[i^]*t[i^]m; 277), a. [L. maritimus, fr. mare the sea:
   cf. F. maritime. See Mere a pool.]
   1. Bordering on, or situated near, the ocean; connected with
      the sea by site, interest, or power; having shipping and
      commerce or a navy; as, maritime states. "A maritime
      town." --Addison.
      [1913 Webster +PJC]

   2. Of or pertaining to the ocean; marine; pertaining to
      navigation and naval affairs, or to shipping and commerce
      by sea. "Maritime service." --Sir H. Wotton.
      [1913 Webster]

   Maritime law. See Law.

   Maritime loan, a loan secured by bottomry or respodentia
      bonds.

   Martime nations, nations having seaports, and using the sea
      more or less for war or commerce.
      [1913 Webster] Maritime provinces

WordNet (r) 3.0 (2006):

maritime
    adj 1: relating to or involving ships or shipping or navigation
           or seamen; "nautical charts"; "maritime law"; "marine
           insurance" [syn: nautical, maritime, marine]
    2: bordering on or living or characteristic of those near the
       sea; "a maritime province"; "maritime farmers"; "maritime
       cultures"

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "maritime":
   bathymetric, bathyorographical, deep-sea, hydrographic, marine,
   nautical, naval, navigational, ocean-going, oceanic, oceanographic,
   pelagic, salty, seafaring, seamanlike, seamanly, terriginous,
   thalassic, water-borne