a metal fork with several prongs, used to lift and turn sacrificial meat over a fire or out of a boiling pot
A fork of this kind was a working tool, not tableware. It was made of bronze and belonged to a small set of implements built for the altar, alongside the pots, the shovel (יָעֶה) for clearing ash, the basins (מִזְרָק) that caught blood, and the pans (מַחְתָּה) that carried live coals. Its job was meat: lifting a portion of a sacrifice off the fire or out of a boiling pot, turning it over, and moving it where it needed to go.
Only one passage shows the fork in somebody's hand, and it is the reason many readers know the word at all. At the shrine in Shiloh the servant of Eli's sons would come while the meat was still boiling, carrying a fork with three teeth, and jab it into the pot to take whatever came up, before God's portion had been burned. That is the one place the tool gets described rather than simply listed, and the description matches what the earliest translators understood: a metal fork with several prongs, long enough to reach into a cauldron.
Everywhere else the word is a line item, and the lists disagree about the metal. In the tabernacle accounts and in the record of Solomon's temple the forks are bronze, but David's plan for the temple in 1 Chronicles 28:17 calls for them in pure gold, the only place the Bible says so. Scholars account for the difference in several ways, from two separate sets of forks for two areas of the temple to editorial layers left unresolved, and none of the explanations has won general agreement.