What is Droit?

Legal Definition
A French word, which, in that language, signifies the whole collection of laws, written and unwritten, and is synonymous to our word law. It also signifies a right, il n'existe point de droits sans devoirs, et vice versa. 1 Toull. n. 96; Poth. h. t. With us it means right, jus. Co. Litt. 158. A person was said to have droit droit, plurimum juris, and plurimum possessionis, when he had the freehold, the fee, and the property in him. Id. 266; Crabb's H. Eng. L. 400.
-- Bouviers Law Dictionary
Legal Definition
In French law. Right, justice, equity, law, the whole body of law; also a right. This term exhibits the same ambiguity which is discoverable in the Gorman equivalent, "recht" and the English W(ord "right." On the one hand, these terms answer to the Roman "jus," and thus indicate law in the abstract, considered as the foundation of all rights, or the complex of underlying moral principles which impart the character of justice to all positive law, or give it an ethical content.

Taken in this abstract sense, the terms may be adjectives, in which case they are equivalent to "Just," or nouns, in which case they may be paraphrased by the expressions "justice," "morality," or "equity." On the other hand, they serve to point out a right; that is, a power, privilege, faculty, or demand, inherent in one person, and incident upon another. In the latter signification, droit (or recht or right) is the correlative of "duty" or "obligation." In the former, sense, it may be considered as opposed to wrong, injustice, or the absence of law. Droit has the further ambiguity that it is sometimes used to denote the existing body of law considered as one whole, or the sum total of a number of individual laws taken together. See Jus; Recht; Right.
-- Black's Law Dictionary
Legal Definition
A droit (French for right or Law) is a legal title, claim or due.
-- Wikipedia
Legal Definition
Right; law; justice.
-- Ballentine's Law Dictionary