Dictionary Definition :
Definition[1]
:
The Sarvāstivādah school maintains that as the three states (past, present, future) are real, so the substance of all things is permanent; i.e. time is real, matter is eternal.
Source
:
A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous
Definition[2]
:
(術語)小乘教中一切有部宗所立。三世實有謂時間的諸法體性實在也。法體恒有謂空間的諸法體性實有也。所見事物之生滅,惟為體上之作用,於自體非有生滅,故謂法體為恒有。【參見: 三世】
Source
:
丁福保《佛學大辭典》