1. art. Definite grammatical article that implies necessarily that an entity it articulates is presupposed; something already mentioned, or completely specified later in that same sentence, or assumed already
I’m reading the book. (Compare I’m reading a book.)
The street in front of your house. (Compare A street in Paris.)
The men and women watched the man give the birdseed to the bird.
2. art. Used before a noun modified by a restrictive relative clause, indicating that the noun refers to a single referent defined by the relative clause.