literal
Exactly true, using words in their most basic meaning.
Literal means exactly what the words say, without exaggeration or metaphor. When you describe something literally, you're being completely factual and precise.
If your teacher says “This assignment is due tomorrow,” that's a literal statement: the assignment really is due the next day. But if your friend complains “I'm literally dying of boredom,” they're misusing the word. They're not actually dying; they're just very bored. A clearer way to express that feeling would be “I'm figuratively dying of boredom” or simply “I'm so bored.”
The literal meaning of words is their straightforward, dictionary definition. When someone takes you literally, they believe exactly what you said. If you tell your dad “I could eat a horse” and he takes you literally, he might start worrying about where to find a horse to eat! But he knows you mean figuratively that you're very hungry.
People sometimes confuse literal with figurative language. If it's raining heavily and you say “It's raining cats and dogs,” the literal meaning would be actual cats and dogs falling from the sky (which would be terrifying!). The figurative meaning is just that it's raining hard.
Being literal matters in situations where precision counts: giving directions, following recipes, or explaining what really happened. When accuracy is important, speaking literally helps avoid confusion.