MIAB may refer to:
Magnetically Impelled Arc Butt, a type of welding process Member of the International Association of Book-keepers Message in a bottle, a form of communication whereby a message is sealed in a container and released into a body of water mind.in.a.box, an Austrian electronic music band Music Industry Association of Belize, an organization formed by Ivan Duran Magnesium-ion aqueous battery, a magnesium-ion battery with water-based electrolyte
See also Meyab Miab, East Azerbaijan