Mass. Gen. Laws ch. 40, § 1A: District defined

Section 1A. Except as otherwise expressly provided, the word ''district'' as used in this chapter shall mean a fire, water, sewer, water pollution abatement, refuse disposal, light, or improvement district, or any other district, howsoever named, formed for the purpose of carrying out any of the aforementioned functions, whether established under general law or special act.