名詞 earth:

1. the 3rd planet from the sun; the planet we live on
   同義詞：world, globe
2. the loose soft material that makes up a large part of the land surface
   同義詞：ground
3. the solid part of the earth's surface
   同義詞：land, dry land, ground, solid ground, terra firma
4. the abode of mortals (as contrasted with heaven or hell)
5. once thought to be one of four elements composing the universe (Empedocles)
6. the concerns of this life as distinguished from heaven and the afterlife
   同義詞：worldly concern, earthly concern, world
7. a connection between an electrical device and a large conducting body, such as the earth (which is taken to be at zero voltage)
   同義詞：ground

動(dòng)詞 earth:

1. hide in the earth like a hunted animal
2. connect to the earth

1. The police eventually ran him to earth in Paris.
   警察窮追不舍，終於在巴黎找到了他。
2. The moon goes round the earth.
   月亮繞著地球轉(zhuǎn)。
3. The earth in the garden is good, soft soil.
   花園里的泥土松軟肥沃。

earth

n.（名詞）

The land surface of the world.
地表，陸地：地球的那層陸地表面
The softer, friable part of land; soil, especially productive soil.
泥：軟且易碎的陸地部分；泥土，尤指肥沃的泥土
Often Earth The third planet from the sun, having a sidereal period of revolution about the sun of 3'5.2' days at a mean distance of approximately 49 million kilometers (92.9' million miles), an axial rotation period of 23 hours 5'.07 minutes, an average radius of ',374 kilometers (3,959 miles), and a mass of approximately 29. × 024 kilograms (3.7 × 0 24 pounds).
常作 Earth 地球：離太陽第三遠(yuǎn)的行星，繞太陽轉(zhuǎn)動(dòng)的恒星周期為3'5.2'天，平均距離大約是.49億平方公里(9,29'萬英里），自轉(zhuǎn)一周的周期為23小時(shí)5'.07分，平均半徑為',374公里(3,959英里），質(zhì)量大約是29.×024千克(3.7×0 24英鎊）
The realm of mortal existence; the temporal world.
人間，俗世：世間凡人凡物居住的地方；凡塵世界
The human inhabitants of the world:
人類：在地球上居住的人類：
例句：
The earth received the news with joy.
全世界人們都為這消息歡呼

Worldly affairs and pursuits.
塵事，俗事：凡人俗事或凡人的物質(zhì)欲望
Everyday life; reality:
日常生活；現(xiàn)實(shí)：
例句：
was brought back to earth from his daydreams of wealth and fame.
把他從名利夢中拉回到現(xiàn)實(shí)

The substance of the human body; clay.
人體；肉體：人軀體的物質(zhì)；肉體
The lair of a burrowing animal.
洞穴：穴居動(dòng)物的洞穴
Chiefly British The ground of an electrical circuit.
【多用于英國】 地線，接地：電路的地線
Chemistry Any of several metallic oxides, such as alumina or zirconia, that are difficult to reduce and were formerly regarded as elements.
【化學(xué)】 難以還原的氧化物：某種金屬氧化物，如鋁化合物、鋅化合物，難以被還原成元素的
v.（動(dòng)詞）
earthed,earth.ing,earths
v.tr.（及物動(dòng)詞）
To cover or heap (plants) with soil for protection.
蓋（土）：蓋上或在（植物）上堆土以保護(hù)
To chase (an animal) into an underground hiding place.
追趕入洞穴：將（一動(dòng)物）追趕至一地下藏身處
v.intr.（不及物動(dòng)詞）
To burrow or hide in the ground. Used of a hunted animal.
躲進(jìn)地洞：藏身或躲避到地下。用于指獵物

<習(xí)慣用語>on earth
Among all the possibilities:
究竟：包括所有可能性的情況下：
例句：
Why on earth did you put on that outfitô
你到底為什么要穿上這套服裝ô

來源：
Middle English erthe
中古英語 erthe
from Old English eorthe * see er- 2
源自 古英語 eorthe *參見 er- 2