Nouns

(n)light, visible light, visible radiation(physics) electromagnetic radiation that can produce a visual sensation“the light was filtered through a soft glass window”
(n)light, light sourceany device serving as a source of illumination“he stopped the car and turned off the lights”
(n)lighta particular perspective or aspect of a situation“although he saw it in a different light, he still did not understand”
(n)luminosity, brightness, brightness level, luminance, luminousness, lightthe quality of being luminous; emitting or reflecting light“its luminosity is measured relative to that of our sun”
(n)lightan illuminated area“he stepped into the light”
(n)light, illuminationa condition of spiritual awareness; divine illumination“follow God's light”
(n)light, lightnessthe visual effect of illumination on objects or scenes as created in pictures“he could paint the lightest light and the darkest dark”
(n)lighta person regarded very fondly“the light of my life”
(n)light, lightinghaving abundant light or illumination“they played as long as it was light”, “as long as the lighting was good”
(n)lightmental understanding as an enlightening experience“he finally saw the light”, “can you shed light on this problem?”
(n)sparkle, twinkle, spark, lightmerriment expressed by a brightness or gleam or animation of countenance“he had a sparkle in his eye”, “there's a perpetual twinkle in his eyes”
(n)lightpublic awareness“it brought the scandal to light”
(n)lighta visual warning signal“they saw the light of the beacon”, “there was a light at every corner”
(n)lighter, light, igniter, ignitora device for lighting or igniting fuel or charges or fires“do you have a light?”

Verbs

(v)light, illume, illumine, light up, illuminateintroduce light into“This lamp lightens the room a bit”
(v)light up, fire up, lightbegin to smoke“After the meal, some of the diners lit up”
(v)alight, light, perchto come to rest, settle“Misfortune lighted upon him”
(v)ignite, lightcause to start burning; subject to fire or great heat“Great heat can ignite almost any dry matter”, “Light a cigarette”
(v)fall, lightfall to somebody by assignment or lot; passed“The task fell to me”, “It fell to me to notify the parents of the victims”
(v)unhorse, dismount, light, get off, get downalight from (a horse)
(v)fire, light, ignitestart or maintain a fire in“fire the furnace”

Adjectives

(a)lightof comparatively little physical weight or density“a light load”, “magnesium is a light metal — having a specific gravity of 1.74 at 20 degrees C”
(a)light, light-colored(used of color) having a relatively small amount of coloring agent“light blue”, “light colors such as pastels”, “a light-colored powder”
(a)lightof the military or industry; using (or being) relatively small or light arms or equipment“light infantry”, “light cavalry”, “light industry”, “light weapons”
(a)lightnot great in degree or quantity or number“a light sentence”, “a light accent”, “casualties were light”, “light snow was falling”, “light misty rain”, “light smoke from the chimney”
(a)lightpsychologically light; especially free from sadness or troubles“a light heart”
(a)lightcharacterized by or emitting light“a room that is light when the shutters are open”, “the inside of the house was airy and light”
(s)unaccented, light, weak(used of vowels or syllables) pronounced with little or no stress“a syllable that ends in a short vowel is a light syllable”, “a weak stress on the second syllable”
(s)lighteasily assimilated in the alimentary canal; not rich or heavily seasoned“a light diet”
(s)light(used of soil) loose and large-grained in consistency“light soil”
(s)clean, clear, light, unclouded(of sound or color) free from anything that dulls or dims“efforts to obtain a clean bass in orchestral recordings”, “clear laughter like a waterfall”, “clear reds and blues”, “a light lilting voice like a silver bell”
(s)light, lightsome, trippingmoving easily and quickly; nimble“the dancer was light and graceful”, “a lightsome buoyant step”, “walked with a light tripping step”
(s)lightdemanding little effort; not burdensome“light housework”, “light exercise”
(a)lightof little intensity or power or force“the light touch of her fingers”, “a light breeze”
(a)light(physics, chemistry) not having atomic weight greater than average“light water is ordinary water”
(s)faint, light, swooning, light-headed, lightheadedweak and likely to lose consciousness“suddenly felt faint from the pain”, “was sick and faint from hunger”, “felt light in the head”, “a swooning fit”, “light-headed with wine”, “light-headed from lack of sleep”
(s)lightvery thin and insubstantial“light summer dresses”
(s)abstemious, lightmarked by temperance in indulgence“abstemious with the use of adverbs”, “a light eater”, “a light smoker”, “ate a light supper”
(s)light, scant, shortless than the correct or legal or full amount often deliberately so“a light pound”, “a scant cup of sugar”, “regularly gives short weight”
(s)lighthaving little importance“losing his job was no light matter”
(s)lightintended primarily as entertainment; not serious or profound“light verse”, “a light comedy”
(s)idle, lightsilly or trivial“idle pleasure”, “light banter”, “light idle chatter”
(s)lightdesigned for ease of movement or to carry little weight“light aircraft”, “a light truck”
(s)light, lite, low-cal, calorie-freehaving relatively few calories“light (or lite) beer”, “lite (or light) mayonnaise”, “a low-cal diet”, “cola light”
(s)light, wakeful(of sleep) easily disturbed“in a light doze”, “a light sleeper”, “a restless wakeful night”
(s)easy, light, loose, promiscuous, sluttish, wantoncasual and unrestrained in sexual behavior“her easy virtue”, “he was told to avoid loose (or light) women”, “wanton behavior”

Adverbs

(r)lightly, lightwith few burdens“experienced travellers travel light”