| truth drug or truth serum | |
| —n | |
| informal any of various drugs supposed to have the property of making people tell the truth, as by relaxing them | |
| truth serum or truth serum | |
| —n | |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| truth drug or truth serum | |
| —n | |
| informal any of various drugs supposed to have the property of making people tell the truth, as by relaxing them | |
| truth serum or truth serum | |
| —n | |
truth serum n.
Any of various hypnotic or anesthetic drugs, such as scopolamine or thiopental sodium, used to induce a subject under questioning to talk without inhibition.