Relating to a verb that requires a direct object to complete its meaning.
In the sentence 'She reads a book,' the verb 'reads' is transitive because it requires the object 'a book' to complete its meaning.
Of a mathematical or logical relation: holding between two elements whenever it holds between the first and a third and between the third and the second.
The "less than" relation is transitive: if a < b and b < c, then a < c.