Bypass trust(redirected from AB Trust)
Also found in: Legal.
An irrevocable trust into which the trustor deposits funds and other assets to provide for a surviving spouse. In a bypass trust, the trustor names his/her surviving spouse as beneficiary and provides that the income and/or principal from the trust shall pass to that spouse upon the trustor's death. A bypass trust is common when a person wishes to avoid estate taxes on assets passing to the spouse. See also: Q-TIP.