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.
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            From shop to shop
            Wandering, and littering with unfolded silks
            The polished counter.                 --Cowper.
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   2. A building in which mechanics or artisans work; as, a shoe
      shop; a car shop.
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            A tailor called me in his shop.       --Shak.
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   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.
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   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.]
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   Syn: Store; warehouse. See Store.
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