1 sky

1 starry sky

2 the heavens

1 time and place

2 world of a particular locale and era

3 (physics) space-time

1 to have time (to do sth)

1 empty

2 air

3 sky

4 in vain

1 a worthless piece of paper (idiom)

1 the people are gone and the place is empty (idiom)

2 the sight of a deserted place brings old friends to mind

3 the place is deserted

4 the birds have flown

1 empty-handed (idiom); fig. not receiving anything

1 damaged by groundless slander (idiom)

1 a common occurrence (idiom)