名詞 ensign:

1. a person who holds a commissioned rank in the United States Navy or the United States Coast Guard; below lieutenant junior grade
2. an emblem flown as a symbol of nationality
   同義詞：national flag
3. colors flown by a ship to show its nationality

1. An ensign; a flag.
   軍旗; 旗幟
2. The ensign of the United States is Stars and Stripes.
   美國(guó)國(guó)旗是星條旗。

en.sign

n.（名詞）
A national flag displayed on ships and aircraft, often with the special insignia of a branch or unit of the armed forces.
國(guó)旗：掛于船只或飛機(jī)上的國(guó)旗，常帶有部隊(duì)分隊(duì)或部隊(duì)單位的特殊識(shí)別標(biāo)記
A standard or banner, as of a military unit.
軍旗：一個(gè)部隊(duì)單位的旗幟
Archaic A standard-bearer.
【古語】 掌旗官
[μn.s…n] Abbr. ENS,Ens.
[μn.s…n] 縮寫 ENS,Ens.
A commissioned rank in the U.S. Navy or Coast Guard that is below lieutenant junior grade.
海軍少尉：美海軍或海岸警衛(wèi)隊(duì)中比海軍中尉職低一級(jí)的軍銜
One who holds this rank.
受此軍銜的人

A badge of office or power; an emblem:
徽章：表示官職、權(quán)力的徽章；象征：
例句：
.I want the seals of power and place,/The ensigns of command,/Charged by the people`s unbought grace,/To rule my native land.(John Quincy Adams)
.我要權(quán)大位高的印璽，要發(fā)號(hào)施令的徽章，要它們買不來的人民的寬仁善意來管理，我要這一切來統(tǒng)治我的祖國(guó).(約翰·昆西·亞當(dāng)斯)

A sign; a token.
標(biāo)記；象征物

來源：
Middle English ensigne
中古英語 ensigne
from Old French enseigne
源自 古法語 enseigne
from Latin onsignia [insignia] * see insignia
源自 拉丁語 onsignia [標(biāo)志，識(shí)別標(biāo)記] *參見 insignia