In this subtitle the following words have the meanings indicated. “Business project” has the meaning stated in § 4–201 of this article. “Credit enhancement” means a guarantee, including a guarantee of an obligation backed by a pool of mortgages, or other assurance or security device issued to: improve the credit of a qualified borrowing entity; or upgrade the security or rating of a financial obligation, including: a mortgage backed security; a certificate of participation; and a bond or note issued to finance a development activity described in this subtitle. “Energy conservation project” has the meaning stated in § 4–201 of this article. “Financing” includes acquisition financing, permanent financing, short–term bridge financing, construction financing, and refinancing of a loan or project authorized under this subtitle. “Fund” means the Maryland Housing Fund. “Housing” includes: a single dwelling unit; a multiple dwelling unit; an accessory unit residential facility; a shared–living unit facility, accommodating at least two individuals or families, in which some or all of the living, dining, kitchen, or sanitary facilities are shared; and an ancillary commercial or other facility that is related to, incidental to, and supportive of the housing. “Infrastructure project” has the meaning stated in § 4–201 of this article. “Mortgage” includes: a deed of trust, a security agreement, and a pledge; and any other security arrangement securing a loan, including a mortgage, to finance: the purchase of stock or membership in a cooperative ownership housing corporation; or the construction or rehabilitation of dwelling units in a cooperative ownership housing corporation. “Public purpose project” has the meaning stated in § 4–201 of this article. “Solar energy project” has the meaning stated in § 4–201 of this article.