From Longman Dictionary of Contemporary Englishopen out phrasal verb1 TTRWIDEif a road, path, or passage opens out, it becomes wider into Beyond the forest the path opened out into a track.2 British EnglishSHY if someone opens out, they become less shy → open→ See Verb table
Examples from the Corpus
open into• This starts along a walled lane which opens out into a field.• The lane opened out into a large paved courtyard.• The lane had opened out into a large paved courtyard.• Follow the obvious path leading north along the ridge as the path opens out into a wide track.• They stretched on and on, one opening out into another round every corner.• I pulled into the narrow drive, following it until it opened out into the empty courtyard.• He swallowed hard and headed for the door that opened out into the hall.• The unknown is always the most fearsome, opening out into wide areas of conjecture. 