A simile is used in Act 4, Scene 3, Line 39 of "Romeo and Juliet," when Juliet is describing her fear of waking up in the burial vault and compares it to "the horrible conceit of death and night." Juliet goes on to use another simile on line 49, fearing the "shrieks like mandrakes torn out of the earth."
A simile is a linguistic device that compares something concrete to something abstract. They typically use words,such as "like" or "as" to make this comparison.
Similes are used frequently by William Shakespeare in "Romeo and Juliet." An earlier example, which uses the word "as" instead of "like," comes from Romeo, who says of Juliet: "The brightness of her cheek would shame those stars / As daylight doth a lamp."