sectional /ˈsɛkʃənəl/noun 4adjective 3forms 3 noun4 •An item of furniture composed of modular sections; usually specifically a sectional sofa.Instead of [...] admiring the sleek chrome and leather sectional, they had huddled in a corner. — 2020 •A band sectional, in which one section of a band or orchestra practices separately. •A tournament or match held at the section level, typically between the regionals and the championships. •A sectional chart, a type of map used for navigation in the air. adjective3 •Relating to a section. •Relating to conflict between areas.The U.S. civil war can be considered a sectional dispute. •Separating into sections.Our new sectional couch divided into pieces, but the pieces still wouldn't fit through the door. formssectionals · more sectional · most sectional