tower
A tall, narrow structure (significantly taller than it is wide, either standing alone or forming part of a larger structure.
Other meanings
A very tall open-framed structure on which communications devices are installed.
A similarly framed structure with a platform or enclosed area on top.
Word history
From Ancient Greek "τύρρις".
Where this comes from
This definition is adapted from “tower” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.