What is the meaning of Barring?

present participle and gerund of bar

Bars; an arrangement or pattern of stripes or bars.

The act of fitting or closing something with bars.

The exclusion of someone; blackballing.

Timber used for supporting the roof or sides of shafts.

The sewing of a decorative bar or tack upon a fabric or leather.

Unless something happens; excepting; in the absence of.

present participle and gerund of barr

Source: wiktionary.org