noun
plural -tions
[count] one of the parts that form something
a particular area that is part of a larger place
a part of a newspaper, play, book, etc.
a part of a group of people
[count] :one of several parts made so that something can be put together easily
[count] :a part of a band or orchestra that has instruments of a particular kind
[count] US :one of the parts of an orange, grapefruit, or similar fruit that can be easily separated from each other
see color picture
[count] medical :a layer cut from a part of the body
[noncount] :a diagram showing how something would look if it was cut from the top to the bottom :cross section
[count] mathematics :a shape that is made when a line cuts through a solid figure
[count] US :a piece of land that is one mile wide and one mile long
verb
-tions; -tioned; -tioning
[+ obj] to divide (something) into parts
Brit :to officially send (a mentally ill person) to a psychiatric hospital
section off
[phrasal verb]
section (something) off or section off (something) :to separate (an area) from a larger area