The description for QtQuick::PropertyChanges::explicit in qquickpropertychanges.cpp begins with:

"If explicit is set to true, any potential bindings will be interpreted as once-off assignments that occur when the state is entered."

(see https://doc.qt.io/qt-6/qml-qtquick-propertychanges.html#explicit-prop).

"once-off" is the British equivalent to the American term: "one-off". Being American, I found this confusing and looked into its use. "once-off" appears only twice in Qt source: in qquickpropertychanges.cpp and an in-code comment in a qfontmetrics benchmark.

I think the sentence can be reworded to improve comprehension. For example:

"If explicit is set to true, property values are assigned once when the state is entered rather than creating bindings that update automatically."