1. Existing previously or before something
   - pre-existent, preexisting, pre-existing

See also: antecedent, preexist, preexistence

• turn a profit
• turn a trick
• turn away
• turn back
• turn in
• turn indicator
• turn of events
• turn of expression
• turn of phrase
• turn of the century
• turn on
• turn on a dime
• turn one's stomach
• turn over a new leaf
• turn signal
• turn tail
• turn the corner
• turn the other cheek
• turn the tables
• turn the tide
• turn thumbs down
• turn to
• turn turtle
• turn up the heat
• turn up the pressure