Chasm

Part of speech: noun (n.)

1. A deep opening made by disruption, as a breach in the earth or a rock; a yawning abyss; a cleft; a fissure. That deep, romantic chasm which slanted down the green hill. Coleridge.

2. A void space; a gap or break, as in ranks of men. Memory . . . fills up the chasms of thought. Addison.