\Ob*serv"er\, n.
1. One who observes, or pays attention to, anything;
   especially, one engaged in, or trained to habits of, close
   and exact observation; as, an astronomical observer.
         The observed of all observers.        --Shak.
         Careful observers may foretell the hour, By sure
         prognostic, when to dread a shower.   --Swift.
2. One who keeps any law, custom, regulation, rite, etc.; one
   who conforms to anything in practice. ``Diligent observers
   of old customs.'' --Spenser.
         These . . . hearkend unto observers of times.
                                               --Deut. xviii.
                                               14.
3. One who fulfills or performs; as, an observer of his
   promises.
4. A sycophantic follower. [Obs.] --Beau. & Fl.