This is the 6795th most frequent Portuguese word.
grã
"Grã" in Portuguese means "great" or "grand," often used as a prefix denoting importance or nobility.
In this sentence, the word 'grã' is used as a prefix meaning 'grand' to denote an elevated title or rank, specifically as part of 'grã-duquesa' meaning 'grand duchess'.
A grã-duquesa visitou a catedral.
The grand duchess visited the cathedral.
Here, 'grã' precedes 'Bretanha' to form 'Grã-Bretanha,' which is the name for 'Great Britain.' It indicates importance or distinction in the proper noun.
A ilha Grã-Bretanha é parte do Reino Unido.
The island Great Britain is part of the United Kingdom.
In this case, 'grã' is used to describe a vision as being grand or significant, showing the adjective form illustrating scale or magnificence in a poetic or formal context.