Definition from Wiktionary, the free dictionary
- At the ocean or sea, typically of a ship or person aboard a ship.
- (idiomatic) In a state of confusion or bewilderment.
- Most of the class was at sea after the first week.
2011 September 28, Tom Rostance, “Arsenal 2 - 1 Olympiakos”, BBC Sport:
- Wojciech Szczesny was then called into action twice in a minute to parry fierce drives from Djebbour and Torossidis as Arsenal's back four looked all at sea.