hair's-breadth, hairsbreadth, hair, whisker -- (a very small distance or space; "they escaped by a hair's-breadth"; "they lost the election by a whisker")
whisker, vibrissa, sensory hair -- (a long stiff hair growing from the snout or brow of most mammals as e.g. a cat)
Overview of verb whisker
The verb whisker has 1 sense
bewhisker, whisker -- (furnish with whiskers; "a whiskered jersey")