Final answer:
The unicorn's horn being broken in "The Glass Menagerie" symbolizes Laura's uniqueness and separates her from others.
Step-by-step explanation:
The significance of the unicorn's horn being broken in "The Glass Menagerie" is that it symbolizes Laura's uniqueness and separates her from others.
Throughout the play, Laura is portrayed as fragile and delicate, much like the glass unicorn. The unicorn's horn represents her individuality and her inability to fit in with society.
When the horn is broken, it signifies the shattering of Laura's fragile world and her realization that she cannot be the unique, special person she once thought she was.