Prob. Code, § 267

(a) “Interest” includes the whole of any property, real or personal, legal or equitable, or any fractional part, share, or particular portion or specific assets thereof, or any estate in any such property, or any power to appoint, consume, apply, or expend property, or any other right, power, privilege, or immunity relating to property.

(b) “Interest” includes, but is not limited to, an interest created in any of the following manners:

(1) By intestate succession.

(2) Under a will.

(3) Under a trust.

(4) By succession to a disclaimed interest.

(5) By virtue of an election to take against a will.

(6) By creation of a power of appointment.

(7) By exercise or nonexercise of a power of appointment.

(8) By an inter vivos gift, whether outright or in trust.

(9) By surviving the death of a depositor of a Totten trust account or P.O.D. account.

(10) Under an insurance or annuity contract.

(11) By surviving the death of another joint tenant.

(12) Under an employee benefit plan.

(13) Under an individual retirement account, annuity, or bond.

(14) Under a transfer on death beneficiary designation in a deed or other instrument.

(15) Any other interest created by a testamentary or inter vivos instrument or by operation of law.