re·volve 
/rɪˈvɑ:lv/ verb
re·volves; re·volved; re·volv·ing /rɪˈvɑ:lv/ verb : to turn around a center point or line : rotate [no obj] ▪ As the gear revolves, it turns the other gears. ▪ The Earth revolves on its axis. [+ obj] ▪ The software allows you to revolve images.
revolve around [phrasal verb] 1 revolve around (something) : to move around (something) in a path that is similar to a circle
▪ The planets revolve around the sun. 2 revolve around (someone or something) : to have (someone or something) as a main subject or interest
▪ The discussion revolved around the question of how much money should be given to each department. ▪ Her world revolves around her work/son. [=her work/son is extremely important to her] ▪ His life revolves around playing basketball. [=he plays basketball a lot] ▪ He thinks the world revolves around him. [=he thinks that he is the most important person in the world] ▪ The world does not revolve around you. [=you are not the most important person in the world]
▪ The planets revolve around the sun.
▪ The discussion revolved around the question of how much money should be given to each department. ▪ Her world revolves around her work/son. [=her work/son is extremely important to her] ▪ His life revolves around playing basketball. [=he plays basketball a lot] ▪ He thinks the world revolves around him. [=he thinks that he is the most important person in the world] ▪ The world does not revolve around you. [=you are not the most important person in the world]
