NOUN (5)

1. a thoroughfare (usually including sidewalks) that is lined with buildings;
- Example: "they walked the streets of the small town"
- Example: "he lives on Nassau Street"

2. the part of a thoroughfare between the sidewalks; the part of the thoroughfare on which vehicles travel;
- Example: "be careful crossing the street"

3. the streets of a city viewed as a depressed environment in which there is poverty and crime and prostitution and dereliction;
- Example: "she tried to keep her children off the street"

4. a situation offering opportunities;
- Example: "he worked both sides of the street"
- Example: "cooperation is a two-way street"

5. people living or working on the same street;
- Example: "the whole street protested the absence of street lights"

The Collaborative International Dictionary of English v.0.48:

Street \Street\ (str[=e]t), n. [OE. strete, AS. str[=ae]t, fr.
   L. strata (sc. via) a paved way, properly fem. p. p. of
   sternere, stratum, to spread; akin to E. strew. See Strew,
   and cf. Stratum, Stray, v. & a.]
   1. Originally, a paved way or road; a public highway; now
      commonly, a thoroughfare in a city or village, bordered by
      dwellings or business houses.
      [1913 Webster]

            He removed [the body of] Amasa from the street unto
            the field.                            --Coverdale.
      [1913 Webster]

            At home or through the high street passing.
                                                  --Milton.
      [1913 Webster]

   Note: In an extended sense, street designates besides the
         roadway, the walks, houses, shops, etc., which border
         the thoroughfare.
         [1913 Webster]

               His deserted mansion in Duke Street. --Macaulay.
         [1913 Webster]

   2. the roadway of a street[1], as distinguished from the
      sidewalk; as, children playing in the street.
      [PJC]

   3. the inhabitants of a particular street; as, the whole
      street knew about their impending divorce.
      [PJC]

   The street (Broker's Cant), that thoroughfare of a city
      where the leading bankers and brokers do business; also,
      figuratively, those who do business there; as, the street
      would not take the bonds.

   on the street,
      (a) homeless.
      (b) unemployed.
      (a) not in prison, or released from prison; the murderer
          is still on the street.

   Street Arab, Street broker, etc. See under Arab,
      Broker, etc.

   Street door, a door which opens upon a street, or is
      nearest the street.

   street person, a homeless person; a vagrant.
      [1913 Webster +PJC]

   Syn: See Way.
        [1913 Webster]

WordNet (r) 3.0 (2006):

street
    n 1: a thoroughfare (usually including sidewalks) that is lined
         with buildings; "they walked the streets of the small
         town"; "he lives on Nassau Street"
    2: the part of a thoroughfare between the sidewalks; the part of
       the thoroughfare on which vehicles travel; "be careful
       crossing the street"
    3: the streets of a city viewed as a depressed environment in
       which there is poverty and crime and prostitution and
       dereliction; "she tried to keep her children off the street"
    4: a situation offering opportunities; "he worked both sides of
       the street"; "cooperation is a two-way street"
    5: people living or working on the same street; "the whole
       street protested the absence of street lights"