Meaning of PRESTRESS in English

[pre.stress] vt (1934): to introduce internal stresses into (as a structural beam) to counteract the stresses that will result from applied load (as in incorporating cables under tension in concrete)

[2]pre.stress n (1934) 1: the stresses introduced in prestressing

2: the process of prestressing

3: the condition of being prestressed

Merriam-Webster English vocab.      Английский словарь Merriam Webster.