(1) “Plat” includes plat, plan, plot or replot;

(2) “Regional planning commission” means any regional planning commission established by the department of economic and community development as provided by law, and includes any municipal planning commission designated by the department as the regional planning commission of a planning region composed of the territory of a single municipality, together with the territory adjoining but outside of such municipality, no part of which is outside the municipality's urban growth boundary or, if no such boundary exists, more than five (5) miles beyond the limits of such municipality;

(3) “Road” or “roads” means, relates to and includes roads, streets, highways, avenues, boulevards, parkways, lanes or other ways or any part thereof;

(4)

(A) “Subdivision” means, in any county having a population of not less than thirty-two thousand seven hundred (32,700) nor more than thirty-two thousand seven hundred sixty (32,760), according to the 1980 federal census or any subsequent federal census, the division of a tract or parcel of land into two (2) or more lots, sites or other divisions for the purpose, whether immediate or future, of sale or building development, and includes resubdivision and, when appropriate to the context, relates to the process of subdividing or to the land or area subdivided; provided, that “subdivision” does not include a division of any tract or parcel of land into two (2) or more tracts or parcels when such parts or parcels are five (5) acres or larger in size; and

(B)

(i) “Subdivision” means, in all counties except those in subdivision (4)(A), the division of a tract or parcel of land into two (2) or more lots, sites, or other divisions requiring new street or utility construction, or any division of less than five (5) acres for the purpose, whether immediate or future, of sale or building development, and includes resubdivision and, when appropriate to the context, relates to the process of resubdividing or to the land or area subdivided;

(ii) As used in subdivision (4)(B)(i), “utility construction” does not include the mere extension of individual service pipes or lines for the purpose of directly connecting a single lot, site or other division to existing utility mains.