| 1. | a person or thing that tranquilizes. |
| 2. | a drug that has a sedative or calming effect without inducing sleep. |
| 3. | antianxiety drug. |
| 4. | antipsychotic (def. 2). |
tranquilizer tran·quil·iz·er (trāng'kwə-līz'ər, trān'-)
n.
A drug that promotes tranquility by calming, soothing, quieting, or pacifying without depressant effects.