a.

1. 正常的，正规的，标准的
   The doctor said the child's temperature was normal.

   医生说孩子体温正常。

2. （人的精神，身体）正常发育的
   He did not seem normal to her.

   她觉得他精神似乎不正常。

3. 【数】垂直的；直角的
4. 【化】规度的；当量的；中和性的

n.

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

   两国关系已恢复正常。

2. 【数】法线[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.