What is Clerk?

Legal Definition
A clerk (/klɑːrk/ or /klɜːrk/) is a white-collar worker who conducts general office tasks, or a worker who performs similar sales-related tasks in a retail environment (a retail clerk). The responsibilities of clerical workers commonly include record keeping, filing, staffing service counters, screening solicitors, and other administrative tasks.
-- Wikipedia
Legal Definition
Commerce, contract. A person in the employ of a merchant, who attends only to a part of his business, while the merchant himself superintends the whole. He differs from a factor in this, that the latter wholly supplies the place of his principal in respect to the property consigned to him. Pard. Dr. Com. n. 38, 1 Chit. Pract. 80; 2 Bouv. Inst. n. 1287.
-- Bouviers Law Dictionary
Legal Definition
Officer. A person employed in an office, public or private, for keeping records or accounts. His business is to write or register, in proper form, the transactions of the tribunal or body to which he belongs. Some clerks, however, have little or no writing to do in their offices, as, the clerk of the market, whose duties are confined chiefly to superintending the markets. In the English law, clerk also signifies a clergyman.
-- Bouviers Law Dictionary
Legal Definition
Eccl. law. Every individual, who is attached to the ecclesiastical state, and who has submitted to the ceremony of the tonsure, is a clerk.
-- Bouviers Law Dictionary
Legal Definition
In ecclesiastical law. A person in holy orders; a clergyman; an individual attached to the ecclesiastical state, and who has the clerical tonsure. See 4 Bl. Comm. 366, 367. In practice. A person employed in a public office, or as an officer of a court, whose duty is to keep records or accounts. In commercial law. A person employed by a merchant, or in a mercantile establishment, as a salesman, book-keeper, acoount-ant, amanuensis, etc., invested with more or less authority in the administration of some branch or department of the business, while the principal himself superintends the whole. State v. Barter, 58 N. H. 604; Hamuel v. State, 5 Mo. 264; Railroad Co. v. Trust Co.., 82 Md. 535, 34 Atl, 778, 38 In R. A. 97.
See also
-- Black's Law Dictionary
Legal Definition
A clergyman; the ministerial officer of a court.
-- Ballentine's Law Dictionary