The linear extent in space from one end to the other; the longest dimension of something that is fixed in place.

Dutch: lengte, longitude
Polish: długość

Continuance in time:
— He complained about the length of time required.

synonym: duration.

Polish: czas trwania, długość

The property of being the extent of something from beginning to end.

Polish: objętość, długość

Size of the gap between two places:
— He determined the length of the shortest line segment joining the two points.

synonym: distance.

Roget 180: space, extension, extent, superficial extent, expanse, stretch, hyperspace; room, scope, range, field, way, expansion, compass, sweep, swing, spread.    dimension, length etc. 200; distance etc. 196; size etc. 192; volume; hypervolume.    latitude, play, leeway, purchase, tolerance, room for maneuver.    spare room, elbow room, house room; stowage, roomage^†, margin; opening, sphere, arena.    open space, free space; void etc. (absence) 187; waste; wildness, wilderness; moor, moorland; campagna^†.    abyss etc. (interval) 198; unlimited space; infinity etc. 105; world; ubiquity etc. (presence) 186; length and breadth of the land.    proportions, acreage; acres, acres and perches, roods and perches, hectares, square miles; square inches, square yards, square centimeters, square meters, yards (clothing) &c.; ares, arpents^†.    ... show more

Roget 196: distance; space etc. 180; remoteness, farness^†, far-cry to; longinquity^†, elongation; offing, background; remote region; removedness^†; parallax; reach, span, stride.    outpost, outskirt; horizon; aphelion; foreign parts, ultima Thule [Lat.], ne plus ultra [Lat.], antipodes; long range, giant's stride.    dispersion etc. 73.    [units of distance] length etc. 200.    cosmic distance, light-years.    ... show more

Roget 200: length, longitude, span; mileage; distance etc. 196.    line, bar, rule, stripe, streak, spoke, radius.    lengthening etc. v.; prolongation, production, protraction; tension, tensure^†; extension.    [Measures of length] line, nail, inch, hand, palm, foot, cubit, yard, ell, fathom, rood, pole, furlong, mile, league; chain, link; arpent^†, handbreadth^†, jornada [U.S.], kos^†, vara^†.    [astronomical units of distance] astronomical unit, AU, light-year, parsec.    [metric units of length] nanometer, nm, micron, micrometer, millimicron, millimeter, mm, centimeter, cm, meter, kilometer, km.    pedometer, perambulator; scale etc. (measurement) 466.    ... show more

Polish: dystans, odległość

A section of something that is long and narrow.