The Collaborative International Dictionary of English v.0.48:

Shop \Shop\, obs.
   imp. of Shape. Shaped. --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Shop \Shop\, n. [OE. shoppe, schoppe, AS. sceoppa a treasury, a
   storehouse, stall, booth; akin to scypen a shed, LG. schup a
   shed, G. schoppen, schuppen, a shed, a coachhouse, OHG.
   scopf.]
   1. A building or an apartment in which goods, wares, drugs,
      etc., are sold by retail.
      [1913 Webster]

            From shop to shop
            Wandering, and littering with unfolded silks
            The polished counter.                 --Cowper.
      [1913 Webster]

   2. A building in which mechanics or artisans work; as, a shoe
      shop; a car shop.
      [1913 Webster]

            A tailor called me in his shop.       --Shak.
      [1913 Webster]

   3. A person's occupation, business, profession, or the like,
      as a subject of attention, interest, conversation, etc.;
      -- sometimes in deprecation or disapproval; as, to talk
      shop at a party. Also used attributively, as in shop talk.
      [Webster 1913 Suppl. +PJC]

   4. A place where any industry is carried on; as, a chemist's
      shop; also, (Slang), any of the various places of business
      which are commonly called offices, as of a lawyer, doctor,
      broker, etc.
      [Webster 1913 Suppl.]

   5. Any place of resort, as one's house, a restaurant, etc.
      [Slang, Chiefly Eng.]

   6. the group of workers and the activities controlled by an
      administrator; as, to have five people in one's shop.
      [Colloq.]

   Note: Shop is often used adjectively or in composition; as,
         shop rent, or shop-rent; shop thief, or shop-thief;
         shop window, or shop-window, etc.
         [1913 Webster]

   To smell of the shop, to indicate too distinctively one's
      occupation or profession.

   To talk shop, to make one's business the topic of social
      conversation; also, to use the phrases peculiar to one's
      employment. [Colloq.]
      [1913 Webster]

   Syn: Store; warehouse. See Store.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Shop \Shop\, v. i. [imp. & p. p. Shopped; p. pr. & vb. n.
   Shopping.]
   To visit shops for the purpose of purchasing goods.
   [1913 Webster]

         He was engaged with his mother and some ladies to go
         shopping.                                --Byron.
   [1913 Webster]

WordNet (r) 3.0 (2006):

shop
    n 1: a mercantile establishment for the retail sale of goods or
         services; "he bought it at a shop on Cape Cod" [syn:
         shop, store]
    2: small workplace where handcrafts or manufacturing are done
       [syn: workshop, shop]
    3: a course of instruction in a trade (as carpentry or
       electricity); "I built a birdhouse in shop" [syn: shop
       class, shop]
    v 1: do one's shopping; "She goes shopping every Friday"
    2: do one's shopping at; do business with; be a customer or
       client of [syn: patronize, patronise, shop, shop at,
       buy at, frequent, sponsor] [ant: boycott]
    3: shop around; not necessarily buying; "I don't need help, I'm
       just browsing" [syn: shop, browse]
    4: give away information about somebody; "He told on his
       classmate who had cheated on the exam" [syn: denounce,
       tell on, betray, give away, rat, grass, shit,
       shop, snitch, stag]