1. reversal, turn around

turning in an opposite direction or position

Example Sentences:
'the reversal of the image in the lens'

• reversal

2. swing about, swing around, turn around

turn abruptly and face the other way, either physically or metaphorically

Example Sentences:
'He turned around to face his opponent'
'My conscience told me to turn around before I made a mistake'

• swing about
• swing around

3. turn around

improve dramatically

Example Sentences:
'The new strategy turned around sales'
'The tutor turned around my son's performance in math'

4. pick up, turn around

improve significantly; go from bad to good

Example Sentences:
'Her performance in school picked up'

• pick up