1.
to become no longer able to see sb/sth :
They finally lost sight of land.
2.
to stop considering sth; to forget sth :
We must not lose sight of our original aim.
1.
to become no longer able to see sb/sth :
They finally lost sight of land.
2.
to stop considering sth; to forget sth :
We must not lose sight of our original aim.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005