n.
A direct, straight course.
intr.v., -lined, -lin·ing, -lines.
To move swiftly in a direct, straight course.
[From the belief that a bee returns to its hive in a straight course.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.