1) Taxon 2) Taxonomic category 3) Taxonomic group 
SUPERFAMILY is a database of structural and functional annotation for all proteins and genomes. The SUPERFAMILY annotation is based on a collection of hidden Markov models, which represent structural protein domains at the SCOP superfamily level. A superfamily groups together domains which have an evolutionary relationship. The annotation is produ... A superfamily refers to different concepts in different scientific fields: ==In biology== ==Others== ...
• (n.) A group intermediate between a family and a suborder.
A group of closely related families; superfamily names end in -oidea.
(soo´pәr-fam″ĭ-le) a taxonomic category sometimes established, subordinate to an order and superior to a family. any of a group of proteins having similarities such as areas of structural homology and believed to descend from the same ancestral gene, such as the superfamily of immunoglobul...
Su'per·fam`i·ly noun (Zoology) A group intermediate between a family and a suborder. 
[n] - (biology) a taxonomic group ranking below an order but above a family
noun (biology) a taxonomic group ranking below an order but above a family
a category of related families within an order or suborder.