The word "faint" has multiple meanings, depending on its context.
1) If used as a verb, to faint means to lose consciousness or become unconscious due to lack of oxygen or other reasons such as stress, shock, etc. For example, "She fainted when she saw the accident."
2) If used as an adjective, faint refers to something that is weak, delicate, subtle, or barely perceptible. An example usage would be: "The faint scent of flowers filled the room."
3) In a broader sense, faint can also mean something that is not strong, intense, or vivid. For instance, "The painting had a faint beauty."