hollow

hollow [adj1] empty, hollowed out alveolate, arched, carved out, cavernous, cleft, concave, cupped, cup-shaped, curved, deep-set, depressed, dimpled, excavated, incurved, indented, infundibular, notched, not solid, pitted, striated, sunken, troughlike, unfilled, vacant, vaulted, void; concepts 483,490 —Ant. convex, full, raised, solid hollow [adj2] deep, resonant in sound cavernous, clangorous, dull, echoing, flat, ghostly, low, muffled, mute, muted, resounding, reverberant, ringing, roaring, rumbling, sepulchral, sounding, thunderous, toneless, vibrant, vibrating; concept 594 —Ant. high, light, soft hollow [adj3] meaningless empty, fruitless, futile, idle, nugatory, otiose, pointless, specious, unavailing, useless, vain, worthless; concept 560 —Ant. earnest, meaningful, sincere, substantial hollow [adj4] false, artificial cynical, deceitful, faithless, flimsy, hypocritical, insincere, treacherous, unsound, weak; concept 267 —Ant. frank, genuine, honest, real, sincere, truthful hollow [n] empty or dented area basin, bottom, bowl, cave, cavern, cavity, chamber, channel, cleft, concavity, crater, cup, dale, den, depression, dimple, dip, dish, excavation, groove, gulf, hole, indentation, notch, pit, pocket, sag, scoop, sinkage, sinkhole, socket, trough, vacuity, valley, void; concepts 740,754 —Ant. solid hollow [v] empty out; make concave channel, chase, corrugate, dent, dig, dish, ditch, excavate, furrow, gorge, groove, indent, notch, pit, rabbet, remove, rut, scoop, shovel, trench; concepts 178,211 —Ant. fill, make convex, raise