Definition of “line” - Learner’s Dictionary

line

noun uk us /laɪn/
MARK [ C ]

A2 a long, thin mark:

Sign your name on the dotted line.
Draw a line around your hand.
ROW [ C ]

a row of people or things:

a line of trees
We formed two lines, men on one side and women on the other.
ROPE ETC [ C ]

a piece of rope or wire with a particular purpose:

TELEPHONE [ C ]

B2 the connection between two telephones:

I've got Neil on the line for you (= waiting to speak to you).
I'll be with you in a moment - could you hold the line (= wait), please?
WAITING [ C, U ] US (UK queue)

a row of people waiting for something, one behind the other:

We were standing in line for hours to get tickets.
SONG/POEM [ C ]

B1 a row of words on a page, for example in a song or poem:

The same line is repeated throughout the poem.
lines

the words spoken by an actor in a performance:

I don't know how actors remember all their lines.
OPINION [ C ]

the official opinion of an organization:

[ usually singular ] the government's line on immigration
along the lines of sth

based on and similar to something:

He gave a talk along the lines of the one he gave in Oxford.
sb's line of reasoning/thinking, etc

your reasons for believing that something is true or right

PRODUCT [ C ]

a type of product that a company sells:

They're advertising a new line in garden furniture.
DIRECTION [ C ]

the direction that something moves in:

He can't kick the ball in a straight line.
lines

the marks that older people have on their faces, when the skin is loose

BORDER [ C ] US

a border between two areas:

the New York state line
be on the line

If someone's job is on the line, they may lose it.

be in line for sth

to be likely to get something good, especially a job

be in line with sth

to be similar to and suitable for something:

a pay increase in line with inflation
→ See also the bottom line , dotted line , front line , hard line , draw the line at sth , toe the (party) line

(Definition of “line noun” from the Cambridge Learner's Dictionary © Cambridge University Press)