slab noun Stress: first syllable 🤍 Save Syllables: slab (1) English Definition A large, thick, flat piece of stone, concrete, or wood. Example Sentence They laid a concrete slab on the floor. US IPA /slæb/ 🔊 Listen US UK IPA /slæb/ 🔊 Listen UK Synonyms block chunk tablet plate piece Antonyms sliver shred fragment Share this Word Facebook WhatsApp X Telegram Copy Link