adjective (a)

• relating to a single dimension or aspect; having no depth or scope(adj.all)

  Example:
  A prose statement of fact is unidimensional, its value being measured wholly in terms of its truth.
  

  Synonym:
  one-dimensional
  Antonym:
  multidimensional
  

  source: wordnet30
• Having but one dimension. See Dimension.(adjective)

  source: webster1913