n A path through two or more points (compare ‘segment’); a continuous mark, including as made by a pen; any path, curved or straight.
n (geometry) An infinitely extending one-dimensional figure that has no curvature; one that has length but not breadth or thickness.
n (geometry, informal) A line segment; a continuous finite segment of such a figure.
n (graph theory) An edge of a graph.
n (geography) A circle of latitude or of longitude, as represented on a map.
n (geography, 'the line' or 'equinoctial line') The equator.
n (music) One of the straight horizontal and parallel prolonged strokes on and between which the notes are placed.
n (cricket) The horizontal path of a ball towards the batsman (see also length).
n (soccer) The goal line.
n (automotive) A particular path taken by a vehicle when driving a bend or corner in the road.
n A rope, cord, string, or thread, of any thickness.
n A hose or pipe, of any size.
n Direction, path.
n The wire connecting one telegraphic station with another, a telephone or internet cable between two points: a telephone or network connection.
n A clothesline.
n A letter, a written form of communication.
n A connected series of public conveyances, as a roadbed or railway track; and hence, an established arrangement for forwarding merchandise, etc.
n (military) A trench or rampart, or the non-physical demarcation of the extent of the territory occupied by specified forces.
n The exterior limit of a figure or territory: a boundary, contour, or outline; a demarcation.
n A long tape or ribbon marked with units for measuring; a tape measure.
n (obsolete) A measuring line or cord.
n That which was measured by a line, such as a field or any piece of land set apart; hence, allotted place of abode.
n A threadlike crease or wrinkle marking the face, hand, or body; hence, a characteristic mark.
n Lineament; feature; figure (of one's body).
n A more-or-less straight sequence of people, objects, etc., either arranged as a queue or column and often waiting to be processed or dealt with, or arranged abreast of one another in a row (and contrasted with a column), as in a military formation.
n (military) The regular infantry of an army, as distinguished from militia, guards, volunteer corps, cavalry, artillery, etc.
n (music) A series of notes forming a certain part (such as the bass or melody) of a greater work.
n A series or succession of ancestors or descendants of a given person; a family or race; compare lineage.
n A small amount of text. Specifically:
n A written or printed row of letters, words, numbers, or other text, especially a row of words extending across a page or column, or a blank in place of such text.
n A verse (in poetry).
n A sentence of dialogue, especially in a play, movie, or the like.
n A lie or exaggeration, especially one told to gain another's approval or prevent losing it.
n Course of conduct, thought, occupation, or policy; method of argument; department of industry, trade, or intellectual activity.
n The official, stated position (or set of positions) of an individual or group, particularly a political or religious faction.
n (slang) Information about or understanding of something. (Mostly restricted to the expressions get a line on, have a line on, and give a line on.)
n A set of products or services sold by a business, or by extension, the business itself.
n (stock exchange) A number of shares taken by a jobber.
n Any of an ill-defined set of units of length, varying according to the country, discipline, industry, and date of application, commonly with no indication of the intended magnitude:
n (historical) A tsarist-era Russian unit of measure, approximately equal to one tenth of an English inch, used especially when measuring the calibre of firearms.
n One twelfth of an inch.
n One sixteenth of an inch.
n One fortieth of an inch.
n (historical) A maxwell, a unit of magnetic flux.
n (baseball, slang, 1800s, with "the") The batter's box.
n (fencing) The position in which the fencers hold their swords.
n (engineering) Proper relative position or adjustment (of parts, not as to design or proportion, but with reference to smooth working).
n A small path-shaped portion or serving of a powdery illegal drug, especially cocaine.
n (obsolete) Instruction; doctrine.
n (genetics) A population of cells derived from a single cell and containing the same genetic makeup.
n (perfusion line) a set composed of a spike, a drip chamber, a clamp, a Y-injection site, a three-way stopcock and a catheter.
n (ice hockey) A group of forwards that play together.
n (Australian rules football) A set of positions in a team which play in a similar position on the field; in a traditional team, consisting of three players and acting as one of six such sets in the team.
n (medicine, colloquial) A vascular catheter.
n (South Korean idol fandom) A group of people born in a certain year (liners).
v (transitive) To place (objects) into a line (usually used with "up"); to form into a line; to align.
v (transitive) To place persons or things along the side of for security or defense; to strengthen by adding; to fortify.
v (transitive) To form a line along.
v (transitive) To mark with a line or lines; to cover with lines.
v (rail transport) To align (one or more switches) to direct a train onto a particular track.
v (transitive, obsolete) To represent by lines; to delineate; to portray.
v (transitive) To read or repeat line by line.
v (intransitive, baseball) To hit a line drive; to hit a line drive which is caught for an out. Compare fly and ground.
v (transitive) To track (wild bees) to their nest by following their line of flight.
v (transitive) To measure.
n (obsolete) Flax; linen, particularly the longer fiber of flax.
v (transitive) To cover the inner surface of (something), originally especially with linen.
v To reinforce (the back of a book) with glue and glued scrap material such as fabric or paper.
v (transitive) To fill or supply (something), as a purse with money.
v (transitive, now rare, of a dog) To copulate with, to impregnate.
n An English and Scottish surname.
n A close quarters combat system, see LINE (combat system) on Wikipedia.Wikipedia
n (military, nautical) Ellipsis of line of battle. [(military) The position of troops drawn up in their usual order without any determined maneuver.]
n (advertising) Short for agate line. [A unit of advertising space that is one column wide and one agate (one fourteenth of an inch) deep.]
n (genetics) Acronym of long interspersed nuclear element, a type of retrotransposon in genomics.