1. (

• sphere ,
• domain ,
• area ,
• orbit ,
• field ,
• arena

) a particular environment or walk of life; "his social sphere is limited"; "it was a closed area of employment"; "he's out of my orbit" ;

2. (

• arena

) the central area of an ancient Roman amphitheater where contests and spectacles were held; especially an area that was strewn with sand ;

3. (

• stadium ,
• bowl ,
• arena ,
• sports_stadium

) a large structure for open-air sports or entertainments ;

4. (

• arena ,
• scene_of_action

) a playing field where sports events take place ;