distinguished citizen; patriot
A person of outstanding character and devotion to their country; often carries a somewhat formal or literary tone.
He is respected as a true patriot.
He calls himself a patriot, but he hasn't actually done anything for the country.
He began his speech with the air of a great patriot.
志士 refers to a person of high ideals who works for a cause (often used for Edo-period activists), while 国士 more broadly praises someone's outstanding character and devotion to the country.
国司 (identical reading) was a historical provincial governor appointed by the imperial court, while 国士 means a distinguished, patriotic person of great character.
peerless person; unrivaled talent · thirteen orphans (mahjong)
Standard kanji spelling; the only written form.
From 国 (country) + 士 (gentleman, scholar, warrior), originally referring to a person of high standing who serves the nation.