What is the meaning of Barrer?

One who or that which bars.

A non-SI unit of gas permeability.

to bar, bar up (to lock or bolt with a bar)

to bar off

to cross out, strike out (put written lines through written text, to show it is erroneous)

to go away, to leave, to fuck off

to lock, as in a door, not necessarily with a bar.

to sweep

indefinite plural of barre

to sweep

Source: wiktionary.org