The OSI definition includes the four freedoms, just stated in different ways:
"The freedom to run the program as you wish, for any purpose" - "The license must not restrict anyone from making use of the program in a specific field of endeavor."
"The freedom to study how the program works, and change it so it does your computing as you wish" - "The program must include source code (...) The license must allow modifications and derived works"
"The freedom to redistribute copies so you can help your neighbor" - "The program (...) must allow distribution in source code as well as compiled form."
"The freedom to distribute copies of your modified versions to others" - "The license must allow modifications and derived works, and must allow them to be distributed under the same terms as the license of the original software."
That's why almost all software considered "open source" is also "free software" and vice-versa.