Capable of being broken down into simpler components or elements. The complex problem was decomposable into smaller, more manageable parts.
Able to be chemically broken down into simpler substances, especially by bacteria or other living organisms. The packaging is made from decomposable materials that won't harm the environment.
In mathematics, able to be expressed as a direct sum, product, or other combination of simpler, non-trivial subobjects. Over this field, the representation is decomposable into two irreducible components.