Source : Webster's Revised Unabridged Dictionary (1913)

Chain \Chain\, v. t. [imp. p. p. {Chained} (ch[=a]nd); p. pr. &
   vb. n. {Chaining}.]
   1. To fasten, bind, or connect with a chain; to fasten or
      bind securely, as with a chain; as, to chain a bulldog.

            Chained behind the hostile car.       --Prior.

   2. To keep in slavery; to enslave.

            And which more blest? who chained his country, say
            Or he whose virtue sighed to lose a day? --Pope.

   3. To unite closely and strongly.

            And in this vow do chain my soul to thine. --Shak.

   4. (Surveying) To measure with the chain.

   5. To protect by drawing a chain across, as a harbor.