I think soul is the sensation resulting from the combination of an organic body with breath or spirit.
"Yahweh Elohim formed the human out of soil from the ground, and He blew into his nostrils the breath of life; and the human became a living soul." (Genesis 2:7)
"The soul of the flesh, it is in the blood." (Leviticus 17:11)
"The soul of all flesh, it is its blood." (Leviticus 17:14)
I've read that immortality of the soul was the philosophy of Plato adopted by the Roman Catholic Church to support its doctrine of torture forever in fire.
"The living know that they shall die, but the dead know nothing." (Ecclesiastes 9:5)
I think scripture is clear that all humans are living souls who are dying but will eventually be given immortality in spiritual bodies at different times. Christ has already been vivified. When Christ meets believers in the air, we will be vivified with spiritual bodies to be alive through the last two eons and beyond, but unbelievers will be vivified when death is abolished at the consummation of the eons.
"There are bodies celestial as well as bodies terrestrial. But a different glory, indeed, is that of the celestial, yet a different that of the terrestrial, another glory of the sun, and another glory of the moon, and another glory of the stars, for star is excelling star in glory. Thus also is the resurrection of the dead. It is sown in corruption; it is roused in incorruption. It is sown in dishonor; it is roused in glory. It is sown in infirmity; it is roused in power. It is sown a soulish body; it is roused a spiritual body. If there is a soulish body, there is a spiritual also. Thus it is written also, The first man, Adam, "became a living soul:" the last Adam a vivifying Spirit. But not first the spiritual, but the soulish, thereupon the spiritual. The first man was out of the earth, soilish; the second Man is the Lord out of heaven. Such as the soilish one is, such are those also who are soilish, and such as the Celestial One, such are those also who are celestials. And according as we wear the image of the soilish, we should be wearing the image also of the Celestial. Now this I am averring, brethren, that flesh and blood is not able to enjoy an allotment in the kingdom of God, neither is corruption enjoying the allotment of incorruption. Lo! a secret to you am I telling! We all, indeed, shall not be put to repose, yet we all shall be changed, in an instant, in the twinkle of an eye, at the last trump. For He will be trumpeting, and the dead will be roused incorruptible, and we shall be changed. For this corruptible must put on incorruption, and this mortal put on immortality. Now, whenever this corruptible should be putting on incorruption and this mortal should be putting on immortality, then shall come to pass the word which is written, Swallowed up was Death by Victory. Where, O Death, is your victory? Where, O Death, is your sting?" (1 Corinthians 15:40-55)
"I am charging you in the sight of God, Who is vivifying all, and of Jesus Christ, Who testifies in the ideal avowal before Pontius Pilate, that you keep this precept unspotted, irreprehensible, unto the advent of our Lord, Christ Jesus, which, to its own eras, the happy and only Potentate will be showing: He is King of kings and Lord of lords, Who alone has immortality, making His home in light inaccessible, Whom not one of mankind perceived nor can be perceiving, to Whom be honor and might eonian! Amen!" (1 Timothy 6:16)
"Yet now Christ has been roused from among the dead, the Firstfruit of those who are reposing. For since, in fact, through a man came death, through a Man, also, comes the resurrection of the dead. For even as, in Adam, all are dying, thus also, in Christ, shall all be vivified. Yet each in his own class: the Firstfruit, Christ; thereupon those who are Christ's in His presence; thereafter the consummation, whenever He may be giving up the kingdom to His God and Father, whenever He should be nullifying all sovereignty and all authority and power. For He must be reigning until He should be placing all His enemies under His feet. The last enemy is being abolished: death. For He subjects all under His feet. Now whenever He may be saying that all is subject, it is evident that it is outside of Him Who subjects all to Him. Now, whenever all may be subjected to Him, then the Son Himself also shall be subjected to Him Who subjects all to Him, that God may be All in all." (1 Corinthians 15:20-28)