I believe determinism to be much more broader, and as having much more farther or further reaching implications than just the philosophical definition, etc... In the "second definition" below...
Definition of determinism
1 philosophy
a : a theory or doctrine that acts of the will (see WILL entry 2 sense 4a), occurrences in nature, or social or psychological phenomena are causally determined by preceding events or natural laws
b : a belief in predestination
2 : the quality or state of (a thing, or everything) being determined (or all predetermined) (always by things before that) (and those before that) (and those before that), etc, etc, etc...
The second definition is how it applies to science beyond just that of philosophy, etc...
And is the definition that matters here, etc...
"Causal determinism" is more what I mean here, for that see this link (below), etc...
Many scientists, many physicists, are coming to more and more of an increased belief in it/this, etc, Einstein did, etc...
Determinism - Wikipedia
I'll, "give you" the parts that matter to me, OK...?
Determinism often is taken to mean causal determinism, which in physics is known as cause-and-effect. It is the concept that events within a given paradigm are bound by causality in such a way that any state (of an object or event) is completely determined by prior states. This meaning can be distinguished from other varieties of determinism mentioned below.
Other debates often concern the scope of determined systems,
with some (many now) maintaining that the entire universe is a single determinate system and others identifying other more limited determinate systems (or multiverse). Numerous historical debates involve many philosophical positions and varieties of determinism. They include debates concerning determinism and free will, technically denoted as compatibilistic (allowing the two to coexist)
and incompatibilistic (denying their coexistence is a possibility). Determinism should not be confused with self-determination of human actions by reasons, motives, and desires. Determinism rarely requires that perfect prediction be practically possible.
The ones I "bolded" are what many scientists who know anything about this at all are increasingly coming to conclude, due to their own observations, in things like physics, etc...
Many "physicists" are beginning to see it as the only real true truth and only real possibility, etc...
Anyway,
God Bless!