from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various tubular optical instruments that contain reflecting elements, such as mirrors and prisms, to permit observation from a position displaced from a direct line of sight.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A form of viewing device that allows the viewer to see things at a different height level and usually with minimal visibility.
- n. : A general or comprehensive view.
- v. To rise and peer around, in the manner of a periscope.
from the GNU version of the Collaborative International Dictionary of English
- n. A general or comprehensive view.
from The Century Dictionary and Cyclopedia
- n. A general view or comprehensive summary. [Rare.]
- n. 2. An instrument by which objects in a horizontal view may be seen through a vertical tube.
- n. in photography, a photographic lens having a wide angle (90° or more).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an optical instrument that provides a view of an otherwise obstructed field
From peri- + -scope. (Wiktionary)