(uncountable) the condition of being illuminated / (uncountable) the relative whiteness or transparency of a colour / (countable) The product of being illuminated.

The state of having little (or less) weight, or little force. / Agility of movement. / Freedom from worry. / Levity, frivolity; inconsistency.

plural of lightness

plural of lighting

(transitive) To set upon or attack.

In the illumination from (a source of light). / (figuratively, chiefly UK and Canada) Based on conclusions derived from (a source of knowledge, evidence or inspiration).

(poetic) Full of light; bright.

Light; cheerful.

present participle of light

The equipment used to provide illumination; the illumination so provided. / The act of activating such equipment, or of igniting a flame etc. / The process of annealing metals.