a.

1. 正常的，正規的，標準的
   The doctor said the child's temperature was normal.

   醫生說孩子體溫正常。

2. 精神正常的；身心健全的
   He did not seem normal to her.

   她覺得他精神似乎不正常。

3. 【數】垂直的；直角的
4. 【化】規度的；當量的；中和性的

n.

1. 標準；常態[S]
   Relations between the two countries have been restored to normal.

   兩國關係已恢復正常。

2. 【數】法線[C]
3. 正常人，正常事物

adj.

1. conforming to a standard; usual, typical, or expected.
2. technical intersecting a given line or surface at right angles.
3. Medicine  containing the same salt concentration as the blood.
   ▸Chemistry,  dated (of a solution) containing one gram-equivalent of solute per litre.
4. Geology  denoting a fault in which a relative downward movement occurred in the strata on the upper side of the fault plane.

n.

1. the normal state or condition:
   her temperature was above normal.
2. technical a line at right angles to a given line or surface.