Uptown City Town Upper Residential Adjective  The Part

Merriam-Webster's Collegiate Dictionary

 DATE  1796

 DATE  1844

uptown
  1802, "the higher or upper portion of a town," from up + town. As this usually was the residential portion of a town (especially a port) the word had overtones of that. Specific meaning "more prosperous area of town" is recorded from 1946.

uptown
up·town / 7Qp5taun / (NAmE) adverb   in or to the parts of a town or city that are away from the centre, where people live
   离开市中心；在(或向)市郊:
   They live in an apartment uptown. 
   他们住在市郊的一套公寓。 
   We walked uptown a couple of blocks until we found a cab. 
   我们向市郊走了好几条街才找到一辆出租车。 
⇨ compare 

downtown

 , 

midtown

adjective1. [only before noun] in, to or typical of the parts of a town or city that are away from the centre, where people live
   在(或向)市郊住宅区的；市郊住宅区的:
   an uptown train 
   开往市郊住宅区的火车 
2. typical of an area of a town or city where people have a lot of money
   富人区的:
   uptown prices 
   富人区的价格 
   an uptown girl 
   富人区的姑娘 

uptown
I. \ˈ ̷ ̷| ̷ ̷\ adverb
Etymology: up (IV) + town, n.
1. : toward, to, or in the upper part of a town or city
 < walked uptown behind two strangers — Sinclair Lewis >
2. : toward, to, or in the residential section of a city
II. adjective
1. : situated in or belonging to the upper part of a town or city
 < uptown streets >
 < uptown theaters >
 < uptown society >
2. : situated in or belonging to the residential section of a city
III. noun
1. : the upper part of a town or city
2. : the residential section of a city
IV. adjective
:  herein :  
 < an uptown dress >