Definition of active barrier in English:

active barrier

Syllabification: ac·tive bar·ri·er

noun

  • 1A barrier that allows passage of defined agents while preventing or impeding others, in particular.
    More example sentences
    • Furthermore, such active barriers are expensive and add equipment and design cost to the system.
    • In the past, there were active barriers that filtered out people of a certain race or gender.
    • The following diagrams showing crash performance data for a variety of passive and active barriers.
  • 1.1A security barrier that responds to attempted entries with sensors or personnel.
    More example sentences
    • This technology takes active barrier structures into the 21st century of perimeter detection systems
    • The active barrier will be placed as a protection of the terrace of the experimental house to demonstrate the possibility to control an outdoor space.
    • Security improvements to perimeter fencing and gates include sentry booths, pass office, truck inspection station, inspection canopy, passive barriers, active barriers, emergency generators, and site lighting.
  • 1.2A physical or chemical barrier that intercepts contaminants, debris, or other unwanted substances.
    More example sentences
    • And what it does is it's an active barrier in the sense that it swells when moisture migrates into it and seals.
    • The biologically active barrier is set up vertical to the groundwater flow direction according to the flow characteristics and main contaminant concentration of the groundwater.
    • This layer behaves as an active barrier that prevents the interfacial reactions between the aluminium and the silicon carbide and that have a detrimental effect on the material properties.

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