an imaginary line between areas, countries, surfaces etc

outer limit

a straight line that joins two points on the circumference of a circle or the ends of an arc

arched, rounded line or object

a journey round a circle or closed route

revolution, track, boundary

a line that marks out a circle or other curved figure

edge, perimeter

an instrument with a needle that points to the magnetic north

boundary, periphery

a line of which no part is straight, e.g. part of the edge of a circle

arched, rounded line or object

the amount, measure, of space or time between two points etc

interval, range

the length, area, range etc (of something)

range, magnitude

a curve of two equal parts formed by cutting through both bases of a double cone

arched, rounded line or object

a flat curve formed by cutting a cone along a line parallel to its side

arched, rounded line or object

(the instrument of) the outer boundary of a closed figure or area

circumference, border

an external boundary or surface

outskirts, outer edge

radius

range, sweep

(the length of) a straight line from the centre of a circle or sphere to any point on the edge or surface; the outer of he two bones in the forearm

range, sweep

a row, line or series (of hills, mountains); a distance at which one can see or hear, or to which sound will carry; distance between limits

sphere, distance, extent

an act of stretching out an arm etc; a length of a river between two bends; to get, go, as far as possible (a place, person, amount etc)

extent, range; stretch

an opportunity; a range of action or observation

extent or range of something

to clear (dust, dirt etc) away (as if) with a brush or broom; to extent;

range, extent