follow Dictionary.com

Why turkey has the same name as Turkey

active barrier1

noun

an object that prevents passage of certain entities but allows passage of predefined entities, esp. a chemical or physical barricade for contaminants or debris

active barrier2

noun

a movable object that prevents passage of certain entities but allows passage of predefined entities, esp. a security barricade

Examples

A sliding gate is an active barrier; a retaining wall is a passive barrier.

Dictionary.com's 21st Century Lexicon
Copyright © 2003-2014 Dictionary.com, LLC
Cite This Source

Word of the Day

Word Value for active

11
13
Scrabble Words With Friends