English Dictionary

fallback

/ˈfɔːl.bæk/

noun

An act of falling back. / A backup plan or contingency strategy; an alternative which can be used if something goes wrong with the main plan; a recourse.

After the initial attack failed, the army had no choice but to retreat, which was a fallback.

意味（1）

An act of falling back.

A failure of one of the rocket's first-stage engines just after liftoff would result in a destructive pad fallback.

意味（2）

A backup plan or contingency strategy; an alternative which can be used if something goes wrong with the main plan; a recourse.

As a fallback, I suppose we can use typewriters if the word processing system fails.

意味（3）

(construction) A reduction in bitumen softening point, sometimes called refluxing or overheating, in a relatively closed container.

意味（4）

Pulverised material that falls back to earth after a nuclear explosion; fallout.

Particle size distributions of fallback and ejecta were determined principally by mechanical sieving and weighing.