Sentence:  A characteristic intension of a term unambiguously describes the extension of that term. But a characteristic intension of a term may be <WSD>"pleonastic</WSD>", i.e., it may contain more properties than it is necessary to define the extension of that term. For instance, the intension of the term "square" consisting of the properties "planeness, quadrilaterality, rectangularity, equilaterality, being inscribable in a circle" would be <WSD>pleonastic</WSD> since it would include more properties than it is necessary to describe the extension of the term "square"....The complete intension always is characteristic and <WSD>pleonastic</WSD>. It is the most <WSD>pleonastic</WSD> of all those intensions which are characteristic of a given set of objects. 
Meaning of the word marked with <WSD> tags:  Characterised by the use of redundant words or an excessive number of words.