'Registrant' definitions:
Definition of 'registrant'
From: WordNet
noun
A person who is formally entered (along with others) in a register (and who obtains certain rights thereby)
Definition of 'Registrant'
From: GCIDE
- Registrant \Reg"is*trant\ (-trant), n. [L. registrans, p. pr.] One who registers; esp., one who, by virtue of securing an official registration, obtains a certain right or title of possession, as to a trade-mark. [1913 Webster]