Definition of expressin:
(n) :
The action of expressing thoughts, ideas, feelings, etc.
(n) :
A particular way of phrasing an idea.
(n) :
A facial appearance usually associated with an emotion.
(n) :
(mathematics) An arrangement of symbols denoting values, operations performed on them, and grouping symbols.
(n) :
(programming) A piece of code in a high-level language that returns a value.
(n) :
(mostly preceded by with) Emotional involvement or engagement in a text read aloud rendered by the voice of the reciter or the reader.