long-winded
Definitions
Continuing for a tedious length of time in speech or writing.
Using too many words; verbose or rambling.
Examples
The professor gave a long-winded lecture that lasted well past the scheduled end time.
I tried to follow his explanation, but it was so long-winded that I eventually lost interest.
Synonyms
verbose wordy prolix rambling garrulous loquacious long-drawn-out