rear admiral(redirected from Rear Admiral (lower half))
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1. A commissioned rank in the US Navy or Coast Guard above captain and below vice admiral. The rank is split into rear admiral, upper half and rear admiral, lower half (formerly commodore).
2. One who holds this rank.
(Nautical Terms) an officer holding flag rank in any of certain navies, junior to a vice admiral
a commissioned officer in the U.S. Navy or Coast Guard ranking above a captain.