jailor, keeper of the prison

Boyd’s Bible Dictionary:

(seizing). Ward or lock-up (Lev. 24:1212And they put him in ward, that the mind of the Lord might be showed them. (Leviticus 24:12); Num. 15:3434And they put him in ward, because it was not declared what should be done to him. (Numbers 15:34)); well or pit (Gen. 37:2424And they took him, and cast him into a pit: and the pit was empty, there was no water in it. (Genesis 37:24); Jer. 38:6-116Then took they Jeremiah, and cast him into the dungeon of Malchiah the son of Hammelech, that was in the court of the prison: and they let down Jeremiah with cords. And in the dungeon there was no water, but mire: so Jeremiah sunk in the mire. 7Now when Ebed-melech the Ethiopian, one of the eunuchs which was in the king's house, heard that they had put Jeremiah in the dungeon; the king then sitting in the gate of Benjamin; 8Ebed-melech went forth out of the king's house, and spake to the king, saying, 9My lord the king, these men have done evil in all that they have done to Jeremiah the prophet, whom they have cast into the dungeon; and he is like to die for hunger in the place where he is: for there is no more bread in the city. 10Then the king commanded Ebed-melech the Ethiopian, saying, Take from hence thirty men with thee, and take up Jeremiah the prophet out of the dungeon, before he die. 11So Ebed-melech took the men with him, and went into the house of the king under the treasury, and took thence old cast clouts and old rotten rags, and let them down by cords into the dungeon to Jeremiah. (Jeremiah 38:6‑11)); part of a palace (2 Chron. 16:1010Then Asa was wroth with the seer, and put him in a prison house; for he was in a rage with him because of this thing. And Asa oppressed some of the people the same time. (2 Chronicles 16:10); Jer. 32:22For then the king of Babylon's army besieged Jerusalem: and Jeremiah the prophet was shut up in the court of the prison, which was in the king of Judah's house. (Jeremiah 32:2); Acts 23:10,3510And when there arose a great dissension, the chief captain, fearing lest Paul should have been pulled in pieces of them, commanded the soldiers to go down, and to take him by force from among them, and to bring him into the castle. (Acts 23:10)
35I will hear thee, said he, when thine accusers are also come. And he commanded him to be kept in Herod's judgment hall. (Acts 23:35)).

“Jailor” From Concise Bible Dictionary:

See PRISON.

“Prison” From Concise Bible Dictionary:

In Egypt, in Babylon, among the Romans, and doubtless in most other nations, these were used as places in which to secure prisoners. Joseph was cast into prison, and his feet were hurt with fetters (Psa. 105:1818Whose feet they hurt with fetters: he was laid in iron: (Psalm 105:18)), though it does not appear that there was any trial as to the crime of which he was accused. God interfered on his behalf, and made the keeper or jailor favorable to him, and he committed all the prisoners into Joseph’s care. This was the royal prison, but the condition of the place is not known: he called it “the dungeon.”
Jeremiah was confined in “the court of the prison,” a place to which the Jews could come and where they could converse with him (Jer. 32:2-122For then the king of Babylon's army besieged Jerusalem: and Jeremiah the prophet was shut up in the court of the prison, which was in the king of Judah's house. 3For Zedekiah king of Judah had shut him up, saying, Wherefore dost thou prophesy, and say, Thus saith the Lord, Behold, I will give this city into the hand of the king of Babylon, and he shall take it; 4And Zedekiah king of Judah shall not escape out of the hand of the Chaldeans, but shall surely be delivered into the hand of the king of Babylon, and shall speak with him mouth to mouth, and his eyes shall behold his eyes; 5And he shall lead Zedekiah to Babylon, and there shall he be until I visit him, saith the Lord: though ye fight with the Chaldeans, ye shall not prosper. 6And Jeremiah said, The word of the Lord came unto me, saying, 7Behold, Hanameel the son of Shallum thine uncle shall come unto thee, saying, Buy thee my field that is in Anathoth: for the right of redemption is thine to buy it. 8So Hanameel mine uncle's son came to me in the court of the prison according to the word of the Lord, and said unto me, Buy my field, I pray thee, that is in Anathoth, which is in the country of Benjamin: for the right of inheritance is thine, and the redemption is thine; buy it for thyself. Then I knew that this was the word of the Lord. 9And I bought the field of Hanameel my uncle's son, that was in Anathoth, and weighed him the money, even seventeen shekels of silver. 10And I subscribed the evidence, and sealed it, and took witnesses, and weighed him the money in the balances. 11So I took the evidence of the purchase, both that which was sealed according to the law and custom, and that which was open: 12And I gave the evidence of the purchase unto Baruch the son of Neriah, the son of Maaseiah, in the sight of Hanameel mine uncle's son, and in the presence of the witnesses that subscribed the book of the purchase, before all the Jews that sat in the court of the prison. (Jeremiah 32:2‑12)). Jehoiachin was in prison in Babylon (Jer. 52:3131And it came to pass in the seven and thirtieth year of the captivity of Jehoiachin king of Judah, in the twelfth month, in the five and twentieth day of the month, that Evil-merodach king of Babylon in the first year of his reign lifted up the head of Jehoiachin king of Judah, and brought him forth out of prison, (Jeremiah 52:31)). The prison at Jerusalem, under the Romans, is more fully described. Peter was bound by two chains, and lay asleep between two soldiers. It was under military rule, and the soldiers were responsible for the safety of the prisoners. The angel conducted Peter through the first and second guard to the outer iron gate that led into the city. This shows what is meant by the “inner prison” mentioned elsewhere (Acts 12). At Philippi there was a jailor who was responsible for the safety of the prisoners. He, supposing some had escaped, was about to destroy himself, when Paul stopped him (Acts 16:23-2723And when they had laid many stripes upon them, they cast them into prison, charging the jailor to keep them safely: 24Who, having received such a charge, thrust them into the inner prison, and made their feet fast in the stocks. 25And at midnight Paul and Silas prayed, and sang praises unto God: and the prisoners heard them. 26And suddenly there was a great earthquake, so that the foundations of the prison were shaken: and immediately all the doors were opened, and every one's bands were loosed. 27And the keeper of the prison awaking out of his sleep, and seeing the prison doors open, he drew out his sword, and would have killed himself, supposing that the prisoners had been fled. (Acts 16:23‑27)).

Strong’s Dictionary of Greek Words:

Number:
1200 (find all occurrences in KJV Bible)
Greek:
δεσμοφύλαξ
Transliteration:
desmophulax
Phonic:
des-mof-oo’-lax
Meaning:
from 1199 and 5441; a jailer (as guarding the prisoners)
KJV Usage:
jailor, keeper of the prison