The following words and phrases when used in this chapter shall have the meanings given to them in this section unless the context clearly indicates otherwise:
"Fiduciary." Includes guardians and trustees, whether domiciliary or ancillary, individual or corporate, subject to the jurisdiction of the orphans' court. The term shall not include a custodian under Chapter 53 (relating to Pennsylvania Uniform Transfers to Minors Act), an agent acting under a power of attorney, a personal representative, an administrator of a municipal pension or retirement plan or a person whose fiduciary duties are, by statute, governed by the principles of Chapter 73 (relating to municipalities investments).
"Mutual fund." The securities of an investment company registered under the Investment Company Act of 1940 (54 Stat. 789, 15 U.S.C. § 80a-1 et seq.).
"Trust." Includes guardianships and trusts subject to the jurisdiction of the orphans' court and having property owned or managed by a fiduciary. The term shall not include custodianships, agencies created by a power of attorney, decedents' estates or municipal pension or retirement plans.