Is a smile literary device?

A smile, in itself, isn't a literary device. However, the *description* of a smile, or its *use* within a narrative, can employ various literary devices. For example:

* Symbolism: A smile could symbolize happiness, sadness, deception, or something else entirely depending on the context.

* Imagery: A detailed description of a smile—e.g., "a thin, tight smile that barely touched her lips"—creates a vivid image in the reader's mind and utilizes imagery.

* Metaphor/Simile: A smile might be compared to something else: "Her smile was like the summer sun," (simile) or "His smile was a mask," (metaphor).

So, while a smile is not itself a literary device, it's a common element within literature that *can be used* to create literary effects.