(broadens, broadening, broadened)
1.
When something broadens, it becomes wider.
The trails broadened into roads...
The smile broadened to a grin.
= widen
VERB: V into/to n, V into/to n, also V
2.
When you broaden something such as your experience or popularity or when it broadens, the number of things or people that it includes becomes greater.
We must broaden our appeal...
The political spectrum has broadened.
VERB: V n, V