What does the word "truncate" mean?

The word "truncate" means to shorten by cutting off a part. This term is often used in various contexts, such as mathematics, where it can refer to reducing the number of digits in a number, as well as in general language when discussing cutting or reducing size. The essence of the word is about making something shorter than its original form, which aligns perfectly with the provided answer. This understanding allows one to visualize the action of truncating, as it gives a clear image of a process of cutting down or reducing.

In contrast, the other options do not capture the meaning of "truncate." For instance, extending or lengthening directly opposes the concept of shortening, while dividing into parts and transforming completely imply changes in structure or form, which are different from the idea of shortening by removal.