costume costume /ˈkɑːstuːm/

noun

1. () The attire worn in a play or at a fancy dress ball  ( costume )
   the attire worn in a play or at a fancy dress ball
    He won the prize for best costume
   he won the prize for best costume
   
   
2. () Unusual or period attire not characteristic of or appropriate to the time and place  ( costume )
   unusual or period attire not characteristic of or appropriate to the time and place
    In spite of the heat he insisted on his woolen costume
   in spite of the heat he insisted on his woolen costume
   
   
3. The attire characteristic of a country or a time or a social class  ( costume )
   the attire characteristic of a country or a time or a social class
    He wore his national costume
   he wore his national costume
   
   
4. The prevalent fashion of dress (including accessories and hair style as well as garments)  ( costume )
   the prevalent fashion of dress (including accessories and hair style as well as garments)
   

verb

1. () Dress in a costume  ( dress up , costume )
   dress in a costume
    We dressed up for Halloween as pumpkins
   We dressed up for Halloween as pumpkins
   
2. (performing arts) furnish with costumes; as for a film or play  ( costume )
   (performing arts) furnish with costumes; as for a film or play
   

 megalopolis megalopolis /ˌmɛgəˈlɑːpələs/

noun

1. () A very large urban complex (usually involving several cities and towns)  ( megalopolis )
   a very large urban complex (usually involving several cities and towns)
    The sprawling megalopolis stretched for miles, encompassing several cities and their suburbs.
   The sprawling megalopolis stretched for miles, encompassing several cities and their suburbs.
   
   

 grammarian grammarian /ɡrəˈmɛəriən/

noun

1. () A linguist who specializes in the study of grammar and syntax  ( syntactician , grammarian )
   a linguist who specializes in the study of grammar and syntax
   
   

 Riviera Riviera /ˌrɪviːˈɛrə/

noun

1. A coastal area between La Spezia in Italy and Cannes in France  ( Riviera )
   a coastal area between La Spezia in Italy and Cannes in France
    The Riviera contains some of Europe's most popular resorts
   the Riviera contains some of Europe's most popular resorts