We found 2 dictionaries that define the word sea asters:

General (2 matching dictionaries)

1. sea asters: Merriam-Webster
2. sea asters: Collins English Dictionary

(Note: See sea_aster as well.)

Definitions from WordNet (sea aster) ▸ noun:  a common European salt-marsh aster ▸ Also see sea_aster ▸ Words similar to sea asters ▸ Usage examples for sea asters ▸ Idioms related to sea asters ▸ Wikipedia articles (New!) ▸ Words that often appear near sea asters ▸ Rhymes of sea asters ▸ Invented words related to sea asters