What is the definition of metaphor?

Alanguage that states that one thing is something else; for example, "My love is a rose"

Blanguage that uses an object to represent an idea; for example, a flying bird represents freedom

Ca comparison of one person or thing to all others in a group; for example, "Jacob is the oldest boy on the soccer team"

Da comparison between two things that are similar; for example, "A grapefruit is larger than an orange"