Definition of "tree line" []

• See timberline. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Face grim, Kaplan touched a button on the small comlink attached to the collar of her windbreaker and ordered several agents to scour the tree line for unauthorized visitors."
• "A huge pine tree had fallen from the tree line outside of the fence and rammed a twenty-foot-wide section of the fence into the ground."
• "Lydda stood at the tree line that marked the boundary between the spirit world and the world of life."