caddisworm caddisworm /ˈkædɪsˌwɜrm/

noun

1. Larva of the caddis fly; constructs a case of silk covered with sand or plant debris  ( caddisworm , strawworm , caddice worm , caddis worm )
   larva of the caddis fly; constructs a case of silk covered with sand or plant debris
   
   

 Russian Revolution Russian Revolution /ˈrʌʃən ˌrɛvəˈluːʃən/

noun

1. The revolution against the czarist government which led to the abdication of Nicholas II and the creation of a provisional government in March 1917  ( February Revolution , Russian Revolution )
   the revolution against the czarist government which led to the abdication of Nicholas II and the creation of a provisional government in March 1917
   
   
2. The coup d'état by the Bolsheviks under Lenin in November 1917 that led to a period of civil war which ended in victory for the Bolsheviks in 1922  ( October Revolution , Russian Revolution )
   the coup d'état by the Bolsheviks under Lenin in November 1917 that led to a period of civil war which ended in victory for the Bolsheviks in 1922
   
   

 underground underground /ˈʌndɝˌgraʊnd/

adjective

1. () Under the level of the ground  ( belowground , underground )
   under the level of the ground
    Belowground storage areas
   belowground storage areas
    Underground caverns
   underground caverns
   
2. Conducted with or marked by hidden aims or methods  ( cloak-and-dagger , hole-and-corner , hugger-mugger , clandestine , hush-hush , secret , surreptitious , undercover , underground )
   conducted with or marked by hidden aims or methods
    Clandestine intelligence operations
   clandestine intelligence operations
    Cloak-and-dagger activities behind enemy lines
   cloak-and-dagger activities behind enemy lines
    Hole-and-corner intrigue
   hole-and-corner intrigue
    Secret missions
   secret missions
    A secret agent
   a secret agent
    Secret sales of arms
   secret sales of arms
    Surreptitious mobilization of troops
   surreptitious mobilization of troops
    An undercover investigation
   an undercover investigation
    Underground resistance
   underground resistance
   

adverb

1. Beneath the surface of the earth  ( underground )
   beneath the surface of the earth
    Water flowing underground
   water flowing underground
   
2. In or into hiding or secret operation  ( underground )
   in or into hiding or secret operation
    The organization was driven underground
   the organization was driven underground
   

noun

1. [British] An electric railway operating below the surface of the ground (usually in a city)  ( subway system [ N. American] , tube [UK] , underground [British] , metro , subway [ N. American] )
   an electric railway operating below the surface of the ground (usually in a city)
    In Paris the subway system is called the metro' and in London it is called the tube' or the underground'
   in Paris the subway system is called the metro' and in London it is called the tube' or the underground'
   
   
2. A secret group organized to overthrow a government or occupation force  ( resistance , underground )
   a secret group organized to overthrow a government or occupation force
   

 miles per hour miles per hour /maɪlz pər aʊr/

noun

1. () The ratio of the distance traveled (in miles) to the time spent traveling (in hours)  ( mph , miles per hour )
   the ratio of the distance traveled (in miles) to the time spent traveling (in hours)
     The car was traveling at a speed of 60 miles per hour.
   The car was traveling at a speed of 60 miles per hour.
   
   
2. A speedometer reading for the momentary rate of travel  ( miles per hour , mph )
   a speedometer reading for the momentary rate of travel