n.[C]

1. 基，底，基部[the S]
   The machine rests on a wide base of steel.

   這機器由一個很大的鋼製底座支承。

2. 基礎；基料[S1]
3. 基地，總部
   Our company's base is in Taipei, but we have branches all over the island.

   我們公司的總部在臺北，但是全島都有分公司。

   The explorers set up a base at the foot of the mountain.

   探險者們在山腳下建立了基地。

4. 基本部分，主要成分
5. 【化】鹼；鹽基
6. 【測】基線[S1]
7. 【文】詞根
8. 【數】基數；底邊[S1]
   Ordinary numbers use base 10, but most computers work to base 2.

   普通的數目基數為十，但是多數電腦的基數為二。

9. 【棒】壘

vt.

1. 把……放在基座上
2. 把……建立在某種基礎上
   This play is based on a true story.

   這齣戲以真事為基礎。

3. 以……為基地
4. 以……為起點

a.[B]

1. 基本的，基礎的
   The right to vote is a base civil right.

   選舉權是公民的一項基本權利。

2. 用作基地的

a.

1. 卑鄙的，惡劣的
   To betray a friend is a base action.

   背叛朋友是卑劣的行為。

2. 卑下的，微賤的
   The ex-convict found a base employment for himself.

   那個過去被判過刑的人找到了一份卑微的工作。

3. 拙劣的
4. 沒有價值的
   Iron is a base metal.

   鐵是低值金屬。

n.

1. the lowest part of something, especially the part on which it rests or is supported.
   ▸Architecture  the part of a column between the shaft and pedestal or pavement.
   ▸Botany  & Zoology  the end at which a part or organ is attached to the trunk or main part.
2. a conceptual structure or entity on which something draws or depends:
   the town's economic base collapsed.
   ▸a foundation or starting point.
3. a person's main place of work or residence.
   ▸a centre of operations for military or other activity.
4. a main element or ingredient to which other things are added.
   ▸a substance into which a pigment is mixed to form paint.
5. Chemistry  a substance capable of reacting with an acid to form a salt and water, or of accepting or neutralizing hydrogen ions.
6. Electronics  the middle part of a bipolar transistor, separating the emitter from the collector.
7. Linguistics  the root or stem of a word or a derivative.
   ▸the uninflected form of a verb.
8. Mathematics  a number used as the basis of a numeration scale.
   ▸a number in terms of which other numbers are expressed as logarithms.
9. Baseball  one of the four stations that must be reached in turn to score a run.

v.

1. (base something on) use something as the foundation for:
   the film is based on a novel.
2. use a place as a centre of operations.

adj.

1. without moral principles; ignoble.
2. archaic denoting or befitting a person of low social class.
3. (of coins or other articles) not made of precious metal.