In a successful manner; with success; without failing.
"She successfully completed the marathon despite her injured ankle, crossing the finish line before time ran out."
In plain English: Successfully means doing something well enough to reach your goal or finish it without problems.
"The team successfully completed the project ahead of schedule."
Usage: Use successfully to describe an action that achieves its intended goal or completes a task without failure, such as passing an exam or launching a product. It functions as an adverb modifying verbs and can also modify other adjectives like "successful" in phrases describing outcomes.
Successfully is formed by adding the suffix -ly to the word successful. This construction simply turns the adjective into an adverb describing how something was done.