(to reach) the point at which sth can no longer continue in the same way; the last stop on a bus, train, trolley, or boat route; the back of a queue of people waiting
Oxford54% of films
(to reach) the point at which sth can no longer continue in the same way
And when you come to the end of the line with a buddy who is more than a brother and a little less than a wife,
It's the end of the line.
Editorial23% of films
the last stop on a bus, train, trolley, or boat route
Editorial15% of films
the back of a queue of people waiting
Definitions from the Oxford Advanced Learner's Dictionary, 9th edition