1.Definition: (of a clause) capable of standing syntactically alone as a complete sentence
"The main (or independent) clause in a complex sentence has at least a subject and a verb"
2.Definition: (of political bodies) not controlled by outside forces
3.Definition: free from external control and constraint
"An independent mind", "A series of independent judgments", "Fiercely independent individualism"
4.Definition: not controlled by a party or interest group