Definition of "y-intercept" 
- (noun) A point at which a line crosses the y-axis of a Cartesian grid.
Use "y-intercept" in a sentence
- "Agree with Derek: the y-intercept should be at plus 8."
- "Heh, I think the y-intercept of this graph would be a ways above zero."
- "Slope-intercept form and identify the slope and the y-intercept"