An observation tower on which a guard or lookout is stationed to keep watch, as for enemies, for forest fires, or over prisoners.(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.
Use "watchtower" in a sentence
"He eventually videotapes what he describes as a watchtower, dozens of large tents, an old ambulance, and what he says are picnic tables and games on the other side of a six-foot chain-link fence topped with razor wire."
"But see Isa 8: 9. watch in ... watchtower -- rather, "set the watch.""
"All along the watchtower is Vietnam ... doesn't work where they used it.)"