1Of or resembling glass.

1. 1.1 Having the physical properties of glass; vitreous.
   glassy lavas

   Example sentencesExamples

   • The very crust of the planet had been fused into one massive, glassy solid.
   • Barley sugar (which formerly contained barley, but now does not) is simply sugar which has been slightly caramelized and then abruptly cooled to solidify it to a glassy state.
   • By 6:00 p.m. the storm was gusting fiercely, pushing our sledges around like toys on the glassy ice, even when we were not traveling.
   • Volcanoes form glassy rocks such as obsidian, and in recently formed volcanic rocks scientists have found tunnels that seem to have been created by hungry microbes.
   • The cerussite crystals are bright and glassy and range from colorless to pale gray.
   • The crystals have sharp trapezohedral faces; they have a glassy luster and are quite transparent when unweathered.
   • It seemed to be made of Obsidian, and its glassy back surface shined like a shadowy mirror.
   • Black, glassy metamict material from each of these locations has historically been referred to as samarskite.
   • Hanging from the tall ceiling were millions of thick, glassy stalagmites, all perfectly sharp, their thin points glinting above the large icy pool which stretched across the room.
   • Rarely, small nodules are found that have a ‘sugary’ texture, which is composed of compact masses of minute glassy crystals.
   • Volcanoes of the western Hungarian volcanic field also consistently comprise basal glassy pyroclastic units overlain by lavas that cap buttes.
   • As an added bonus, the lava would simultaneously pave roads and sidewalks when it hardens into a glassy smooth surface of igneous rock.
   • The outer selvages are glassy and the interior tends to be vesicular under low-water pressures.
   • Flint looks glassy and impervious, but in fact is quite porous.
   • Most of the large crystals have glassy terminations formed by an overgrowth of a thin layer of clear quartz.
   • Using abrasives, such as steel wool or abrasive powders tends to permanently scratch the smooth glassy surface, and make it harder to clean thereafter.
   • The mineral crystallizes in the monoclinic system and commonly forms glassy complex crystals of varied habit.
   • Several samples were collected, most of which desiccated and crumbled to powder within a day or so, but one sample retained its glassy, bright blue character for more than a year.
   • Whatever cataclysmic collision forged the glassy rocks occurred about half a million years ago.
   • The smooth glassy surface has no crevices for dirt and spills to hide, but it has to be kept clean to avoid soil burning on and staining, as stains show up visibly.
2. 1.2 (of water) having a smooth surface.
   the glassy grey surface of the lake

   Example sentencesExamples

   • They had passed over a lake with water so pure and clear that she could see giant lobster creatures fighting and biting on the lakebed, hundreds of feet below the glassy surface.
   • Suddenly, instead of skimming the glassy surface, you could be struggling with the deep, dark world of potential disaster.
   • Stunning view out the window now, glassy harbour, sunshine, no wind.
   • Marion poked at the water, making ripples on its glassy surface, but nothing happened.
   • The ship was floating on a glassy surface of ocean.
   • Amy approached the glassy water, rippling with the waterfall's motion.
   • Her fingers grazed the glassy surface of the water, causing ripples to from her touch.
   • The vision inside the mirror waved like a reflection in the water distorted by a ripple in the glassy surface.
   • The winter offers still glassy waters with pink morning skies reflected on their surface.
   • Rafts of puffins and guillemots bobbed on the glassy surface of the water, and I decided to stay here until we passed the bows of the Inverlane.
   • The sea was its usual calm blue, a glassy liquid surface stretching till it fused with the horizon in a spectacle of colour.
   • I gathered up all of my courage and peered into the glassy water.
   • It gives me a pointed blink then bends its long, slender neck down and laps up some water with a snaking, scarlet tongue, making delicate ripples in the glassy water.
   • Day after day passed - no wind - intense heat - glassy waters.
   • The artist was not very interested in the water in the canals of Venice so he usually showed it with evenly painted ripples on an otherwise glassy surface.
   • The sun set behind the ridge leaving a spectrum of deepening light to settle around us in the cool air among the tumbling sound of the glassy water.
   • And the ducks, and the car ferry cutting a swathe in the glassy surface: so it is a lake after all.
   • The clear sky was a startling pink colour, and, as there was not a breath of wind, the glassy surface of the water shone with the same beautiful hue.
   • To the uninitiated, Orkney's Scapa Flow harbour is one square mile of untroubled, glassy water.
   • On your left is the glassy surface of an enormous lake, the sky a deep shade of blue that you thought existed only in crayon boxes.

   Synonyms

   smooth, mirror-like, glass-like, gleaming, shining, shiny, sheeny, glossy, polished

   slippery, slick, icy, ice-covered

   clear, crystal clear, transparent, translucent, limpid, pellucid

   calm, still, flat, unruffled, even, waveless, like a millpond

   informal slippy

   technical vitreous, hyaloid
3. 1.3 (of sound) resembling the sharp noise made when glass is struck.
   a glassy clink

   Example sentencesExamples

   • Sonics are excellent, although higher notes occasionally have a glassy sound.
   • It's not a major drawback since the notes generally come through clearly and realistically, but in louder passages the upper register has a bit of a metallic or glassy sound.
   • My only complaint is that the upper register of the piano sounds unfortunately glassy.

2(of a person's eyes or expression) showing no interest or animation.

A glass marble.