(1) The act of circumscribing
- the act of circumscribing or the quality of being circumscribed
- anything that circumscribes or a circumscribed area
- the definition of what does and does not belong to a given taxon, from a particular taxonomic viewpoint or taxonomic system.
- The circumscription in the APG system of the family Malvaceae includes the former families Bombacaceae, Sterculiaceae and Tiliaceae.