- (taxonomy) A rank in the classification of organisms, below kingdom and above class; also called a division, especially in describing plants; a taxon at that rank
- Mammals belong to the phylum Chordata.
- (linguistics) A large division of possibly related languages, or a major language family which is not subordinate to another.
- (group of languages): superstock
(biology, taxonomy) A rank in the classification of organisms, below kingdom and above class
Second-declension noun (neuter).