What do the words your earth mean in Romeo and Juliet?

In the context of Romeo and Juliet, the words "your earth" are used to refer to the physical body of Romeo. Juliet is speaking to Romeo in a moment of great passion and intimacy, and she is expressing her desire to be physically close to him. She says, "O, Romeo, Romeo, wherefore art thou Romeo? Deny thy father and refuse thy name; Or, if thou wilt not, be but sworn my love, And I'll no longer be a Capulet. / 'Tis but thy name that is my enemy; / Thou art thyself, though not a Montague. / What's Montague? It is nor hand, nor foot, / Nor arm, nor face, nor any other part / Belonging to a man. O, be some other name / Belonging to a man. O, be some other name / Besides thy name, and then my love to thee / Shall be as boundless as the sea, / And as deep as the centre of the earth.

In this passage, Juliet is saying that she doesn't care about Romeo's name or his family background. She loves him for who he is, and she is willing to give up everything to be with him. She says that her love for him is as deep as the centre of the earth, which is a metaphor for the intensity and strength of her feelings.