To mix or blend together. The chef decided to commingle the spices to create a unique flavor for the dish.
To mix or blend together into a single mass or combination (transitive). The chef decided to commingle the spices to create a unique flavor for the dish.
To become mixed or blended (intransitive). Oil and water rarely commingle without an emulsifier.
To mix funds, assets, or property with others so that individual sources cannot be distinguished, often contrary to regulations (finance, law). The trustee must not commingle personal funds with those of the trust.