The phrase "in the broadest terms" is correct and usable in written English. You can use it when you are describing a concept in a general way. For example, "In the broadest terms, the American political system consists of a separation of powers between three branches of government.".
Scott Turow: In the broadest terms it is, like much literature, about life and death.
The first four stories are, in the broadest terms, examples of realism.
For she is really investigating realism, conceived in the broadest terms.
You want a mother to reconnect with her daughter in the broadest terms possible?
What he and United Russia plan to do with that mandate remains unclear, however, because the party outlined its vision for the country in only the broadest terms.
People knew — as they know about me now — that he understood politics in the broad terms of Congress, and he understood the detail of the legislation".
"I support the proposal in the broad terms, it's much more effective to have a national police helicopter and fixed-wing network.
Thanks to Ludwig my first paper got accepted! The editor wrote me that my manuscript was well-written
Listya Utami K.
PhD Student in Biology, Bandung Institute of Technology, Indonesia