The relationship between persons where one person holds property on behalf of or for the benefit of another. A trust may be an "express trust", which is created by a trust agreement; an "implied trust", which the law infers from circumstances; a "resulting trust" by which trust property reverts to the original owner in special circumstances; or a "constructive trust", which is a recently developed remedy by which the law requires reimbursement for unjust enrichment, fraud or other legal wrong.