Source : Webster's Revised Unabridged Dictionary (1913)

Roadstead \Road"stead\, n. [Road, 4 + stead a place.]
   An anchorage off shore. Same as {Road}, 4.

         Moored in the neighboring roadstead.     --Longfellow.

Source : WordNet®

roadstead
     n : a partly sheltered anchorage [syn: {roads}]