A nightstand was a type of table that sat close to one's bed.
In 2369, Lieutenant junior grade Aquiel Uhnari had the book The Fatal Revenge and a bottle of perfume on her nightstand. (TNG: "Aquiel")
In 2370, Daniel Kwan kept a photograph of his girlfriend Maddy Calloway on his nightstand. (TNG: "Eye of the Beholder")
In 2374, Kira Nerys had Bajoran lilacs on her nightstand. Dukat noticed this, and in an effort to prove that he and Meru were once lovers, remarked that her mother would have been touched by the gesture, as she loved Bajoran lilacs. (DS9: "Wrongs Darker Than Death or Night")