a straight line across a billiard table behind which the cue balls are placed at the start of a game
2.
a.
one of four lines parallel to the cushions dividing the table into a central panel and eight smaller ones (the baulks)
b.
a type of game using these lines as restrictions
string line in American English
noun
Billiards & Pool
a line from behind which the cue ball is placed after being out of play; string
Word origin
[1865–70, Amer.]This word is first recorded in the period 1865–70. Other words that entered Englishat around the same time include: black belt, dunk, figure skating, maverick, racism
Examples of 'string line' in a sentence
string line
Secure the string taut to the marked locations with the finishing nails, using a level on the string line.
Globe and Mail (2003)
But after putting everything on red with his second-string line-up, you could not have blamed him for bearing the smuggest of grins after this.
The Sun (2010)
We squared out the ground with string lines, then, on a still and sunny day, we sowed the seed, raked it in and waited.