1.
faint, slight, barely perceptible
Describes something that is very weak or subtle, barely detectable by the senses. Used for sounds, light, smells, movements, or abstract things like hope or memory.
微かな音がした。
I heard a faint sound.
Usage
Describes things that are barely perceptible — sounds, light, smells, sensations, or abstract things like hope or memory. The adverbial form 微かに is also very common.