largeness in WordNet English dictionary

1. the property of having a relatively great size
   largeness  bigness 
   
2. the capacity to understand a broad range of topics
   "a teacher must have a breadth of knowledge of the subject"; "a man distinguished by the largeness and scope of his views"
   breadth  comprehensiveness  largeness 
   
3. large or extensive in breadth or importance or comprehensiveness
   "the might have repercussions of unimaginable largeness"; "the very extensiveness of his power was a temptation to abuse it"
   largeness  extensiveness 
   
4. the quality of being pretentious (behaving or speaking in such a manner as to create a false appearance of great importance or worth)
   pretentiousness  pretension  largeness