The authoritative instrument for the distribution of all forms of official IRS tax guidance is the Internal Revenue Bulletin (IRB), a weekly collection of these and other items of general interest to the tax professional community.
perfidy definition: The definition of a perfidy is a deliberate betrayal. (noun) An example of a perfidy is spreading a best friend's secrets all over town....
Dictionary. Definition of permeable. allowing (especially liquids) to pass or diffuse through; permeable membranes; rock that is permeable by waterSee Also: leaky, pervious. See Also: leaky, pervious. 1  allowing (especially liquids) to pass or diffuse through; permeable membranes; rock that is permeable by water.ee Also: leaky, pervious. 1  allowing (especially liquids) to pass or diffuse through; permeable membranes; rock that is permeable by water.