1. (noun) a particular aspect of life or activity

• sphere

1. (noun) a portion of a military position

• armed forces
• armed services
• military
• military machine
• war machine

1. (noun) a plane figure bounded by two radii and the included arc of a circle

• plane figure
• two-dimensional figure

2. (noun) a social group that forms part of the society or the economy

• social group

3. (noun) a particular aspect of life or activity

• aspect
• facet

4. (noun) the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes

• computer memory unit

5. (noun) a portion of a military position

• parcel
• parcel of land
• piece of ground
• piece of land
• tract

6. (noun) measuring instrument consisting of two graduated arms hinged at one end

• measuring device
• measuring instrument
• measuring system

1. (noun) a social group that forms part of the society or the economy

• black economy
• business
• business sector

2. (noun) a particular aspect of life or activity

• department

1. (noun) a plane figure bounded by two radii and the included arc of a circle

• sectorial