1. Expressions (phrases, clauses, etc.), Particle

   indicates word or phrase being defined

   Colloquialsee とは

2. used for quoting (thoughts, speech, etc.)

   Colloquialindicates contrast or adds emphasis to a negative statementsee とは

3. with

   Colloquialmore emphatic than とsee とは

4. (not) as much as; (not) so much as

   Colloquialwith neg. verbsee とは

5. the fact that; to think that; such a thing as

   Colloquialindicates surprise, disbelief, anger, etc.; sometimes at sentence endsee とは

Also written たta