名詞 formation:

1. an arrangement of people or things acting as a unit
2. a particular spatial arrangement
3. the fabrication of something in a particular shape
   同義詞：shaping
4. the act of forming something
   同義詞：constitution, establishment, organization, organisation
5. (geology) the geological features of the earth
   同義詞：geological formation
6. natural process that causes something to form
7. creation by mental activity

1. Located in or facing the path of an oncoming glacier. Used of a geologic formation.
   冰川運動路線的位于或面對冰川運動路線的。用于地質構造
2. Her front teeth were irregular in formation.
   她的門牙排列不整齊。
3. School life has a great influence on the formation of a child's character.
   學校生活對小孩個性的形成有很大影響。
4. There are several kinds of cloud formations.
   云層的構成方式有好幾種。

for.ma.tion

n.（名詞）
The act or process of forming something or of taking form.
形式，組成：給予某種東西形狀或使之獲得形狀的動作或過程
Something formed:
形成物：已形成的東西：
例句：
beautiful cloud formations.
美麗的云層

The manner or style in which something is formed; structure:
結構：事物形成的樣式；結構：
例句：
the distinctive formation of the human eye.
人眼的獨特結構

A specified arrangement or deployment, as of troops.
隊形：軍隊等的特殊組合和排列
Geology The primary unit of lithostratigraphy, consisting of a succession of strata useful for mapping or description.
【地質學】 地層，巖組：巖石地層的基本單位，構成用于制圖或描繪的一系列層次

【引伸】
forma.tional
adj.（形容詞）