noun (n)

• a slab of stone or wood suitable for bearing an inscription(noun.artifact)

  source: wordnet30
• a number of sheets of paper fastened together along one edge(noun.substance)

  Synonym:
  pad, pad of paper
  

  source: wordnet30
• a small flat compressed cake of some substance(noun.artifact)

  Example:
  A tablet of soap.
  

  source: wordnet30
• a dose of medicine in the form of a small pellet(noun.artifact)

  Synonym:
  lozenge, pill, tab
  

  source: wordnet30
• A small table or flat surface.(noun)

  source: webster1913