Boyd’s Bible Dictionary:
(gate-keepers). Keepers of city, temple, palace, and private gates and doors. The temple had 4000 of them, in classified service (2 Sam. 18:26; 2 Kings 7:10; 1 Chron. 23:5; 26:1-19; 2 Chron. 31:14).
Concise Bible Dictionary:
In scripture this word is used in the sense of doorkeeper. The Levites kept the doors of the temple: it was an honorable office (2 Sam. 18:26; 2 Kings 7:10-11; 1 Chron. 9:17-26; Mark 13:34).
In John 10:3 the Porter is the Spirit of Jehovah working in Israel, who recognized the Lord Jesus as entering in by the door into the sheepfold that as the Good Shepherd He might have access to the sheep.
Strong’s Dictionary of Hebrew Words:
Meaning:
or shomer {sho-are'}: active participle of 8176 (as denominative from 8179); a janitor
KJV Usage:
doorkeeper, porter