Emily Dickinson Lexicon

light (-er, -est), adj. [see light, n.; NW says “This word accords with light, the fluid, in orthography, and may be from the same radix.”]

1. Agile; nimble; weightless; [fig.] unstressed; not accented; without much emphasis; of little weight as a syllable in metrical verse; [word play] merry; mirthful; cheerful; happy; not somber; [metaphor] quiet; silent; soundless; invisible; floating; ghostlike; phantasmal; [metaphor] shining; sparkling.
2. Slight; delicate; not heavy; without gravity; small in mass; having little weight.
3. Superficial; shallow; easily shaken off; not overwhelming; [fig.] temporary; transitory; ephemeral; not permanent.
4. Easier; not onerous; less oppressive; more endurable.