Sea/siː/ Definition 1 of 4Pro Tip 1/3Vastness and power The word often conveys the sea's immense size and power in literature and metaphor. The stormy sea pounded the shore. Pro Tip 2/3Ocean Travel Used to discuss anything related to ocean travel and exploration. She loves reading tales of the sea. Pro Tip 3/3Maritime Culture The sea is central to many cultures and influences food, traditions, and professions. He's from a town by the sea known for fishing.