This is generally thought to mean that we will not be able to sin (incorruptible) as opposed to the physical substance
Act 2:31 He seeing this before spake of the resurrection of Christ, that his soul was not left in hell, neither his flesh did see corruption.
Act 13:34 And as concerning that he raised him up from the dead, [now] no more to return to corruption, he said on this wise, I will give you the sure mercies of David.
Act 13:35 Wherefore he saith also in another [psalm], Thou shalt not suffer thine Holy One to see corruption.
Act 13:36 For David, after he had served his own generation by the will of God, fell on sleep, and was laid unto his fathers, and saw corruption:
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