What is Et Cetera?

Legal Definition
A Latin phrase, which has been adopted into English; it signifies. "and the others, and so of the rest," it is commonly abbreviated, &c.

2. Formerly the pleader was required to be very particular in making his defence. (q. v.) B making full defence, he impliedly admitted the jurisdiction of the court, and the competency of the plaintiff to sue; and half defence was used when the defendant intended to plead to the jurisdictions or disability. To prevent the inconveniences which might arise by pleading full or half defence, it became the practice to plead in the following form: " And the said C D, by E F, his attorney, comes and defends the wrong and injury, when, &c., and says," which was either full or half defence. 2 Saund. 209, c.; Steph. Pl. 432; 2 Chit. Pl. 455.

3. In practice, the &c. is used to supply the place of words which have been omitted. In taking recognizance, for example, it is usual to make an entry on the docket of the clerk of the court, as follows: A B, tent, &c., in the sum of $1000, to answer, &c. 6 S. & R. 427.
-- Bouviers Law Dictionary
Legal Definition
And others; and other things; and so on. In its abbreviated form (etc.) this phrase is frequently affixed to one of a series of articles or names to show that others are Intended to follow or understood to be included. So, after reciting the initiatory words of a set formula or a clause already given in full, etc. is added, as an abbreviation, for the sake of convenience. See Lathers v. Keogh, 39 Hun (N. Y.) 579; Com. v. Ross, 6 Serg. & R. (Pa.) 428; In re Schouler, 134 Mass. 426; High Court v. Schweitzer, 70 111. App. 143.
-- Black's Law Dictionary
Legal Definition
"And other things". Generally used in the sense of "and so forth".
Legal Definition
And other things; and so forth.
-- Ballentine's Law Dictionary