A "Single Wide" is most often referring a trailer or mobile home that is only one section wide. This term came into use when the mobile home industy created the Double Wide mobile home. The typical mobile home then was termed a single wide.
Single Wide Manufactured & Modular Homes. A single wide home, or single section home, is a floor plan with one long section rather than multiple sections joined together. These manufactured homes can be highly compact or very spacious, and come in many different widths, lengths, and room configurations.