sectional

adj

1. Relating to a section.
2. Separating into sections.

   “Our new sectional couch divided into pieces, but the pieces still wouldn't fit through the door.”

3. Relating to conflict between areas.

   “The U.S. civil war can be considered a sectional dispute.”

noun

1. 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.”

2. A sectional chart, a type of map used for navigation in the air.
3. A tournament or match held at the section level, typically between the regionals and the championships.
4. A band sectional, in which one section of a band or orchestra practices separately.