| quantum leap or quantum jump | |
| —n | |
| a sudden highly significant advance; breakthrough | |
| [C20: from its use in physics meaning the sudden jump of an electron, atom, etc from one energy level to another] | |
| quantum jump or quantum jump | |
| —n | |
| [C20: from its use in physics meaning the sudden jump of an electron, atom, etc from one energy level to another] | |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| quantum leap or quantum jump | |
| —n | |
| a sudden highly significant advance; breakthrough | |
| [C20: from its use in physics meaning the sudden jump of an electron, atom, etc from one energy level to another] | |
| quantum jump or quantum jump | |
| —n | |
| [C20: from its use in physics meaning the sudden jump of an electron, atom, etc from one energy level to another] | |
| quantum jump
A change from one quantum state to another, as when an electron orbiting a nucleus moves from one shell to another with the loss or gain of a quantum of energy. |
quantum leap
A dramatic advance, especially in knowledge or method, as in Establishing a central bank represents a quantum leap in this small country's development. This term originated as quantum jump in the mid-1900s in physics, where it denotes a sudden change from one energy state to another within an atom. Within a decade it was transferred to other advances, not necessarily sudden but very important ones.