Definitions:

1. A large, flat, free-floating piece of ice that has broken off from a large ice formation, such as an ice shelf or glacier, and is floating on the surface of the ocean. NOUN
   • Durng the expedition, they observed an ice floe breaking away from the main ice pack.
2. Flat mass of ice that has broken off a larger ice formation, that frequently occurs in polar regions and can pose significant navigational hazards. NOUN
   • The ship carefully navigated through a fild of ice floes to avoid getting trapped.

Synonyms:

• drift ice
• floating ice sheet
• glacial ice chunk
• Ice raft
• ice sheet fragment
• iceberg fragment
• pack ice