Definition of At sea

Babylon English Dictionary
on the open ocean; in a state of confusion, perplexed
Search Dictionary
At sea Definition from Language, Idioms & Slang Dictionaries & Glossaries
hEnglish - advanced version

at sea
at sea, upon the ocean; away from land; figuratively, without landmarks for guidance; lost; at the mercy of circumstances. "to say the old man was at sea would be too feeble an expression." w. cable..
see also sea

WordNet 2.0

Adjective
1. perplexed by many conflicting situations or statements; filled with bewilderment; "obviously bemused by his questions"; "bewildered and confused"; "a cloudy and confounded philosopher"; "just a mixed-up kid"; "she felt lost on the first day of school"
(synonym) baffled, befuddled, bemused, bewildered, confounded, confused, lost, mazed, mixed-up
(similar) perplexed
2. traveling by boat or ship
(synonym) at sea(p), sailing
(similar) afloat(p)
At sea Definition from Business & Finance Dictionaries & Glossaries
2K Group Shipping, Trade, Insurance Dictionary
In marine insurance this phrase applies to a ship which is free from its moorings and ready to sail.
At sea Definition from Government Dictionaries & Glossaries
DOD Dictionary of Military Terms
Includes the following maritime areas: foreign internal waters, archipelagic waters, and territorial seas; foreign contiguous zones; foreign exclusive economic zones; the high seas; and US-exclusive economic zone, territorial sea, and internal waters.
  
Source: U.S. Department of Defense, Joint Doctrine Division. ( About )
At sea Definition from Sports Dictionaries & Glossaries
maritime&shipping&trade
In marine insurance this phrase applies to a ship which is free from its moorings and ready to sail.