'Prophet' in the Bible

Now when David was living in his house, he said to Nathan the prophet, See, I am living in a house of cedar-wood, but the ark of the Lord's agreement is under the curtains of a tent.

Of the sons of Asaph: Zaccur and Joseph and Nethaniah and Asharelah, sons of Asaph; under the direction of Asaph, acting as a prophet under the orders of the king;

Of Jeduthun: the six sons of Jeduthun, Gedaliah and Zeri and Jeshaiah, Hashabiah and Mattithiah; under the direction of their father Jeduthun who, acting as a prophet, with corded instruments gave praise and glory to the Lord.

And everything Samuel the prophet and Saul, the son of Kish, and Abner, the son of Ner, and Joab, the son of Zeruiah, had made holy; whatever anyone had given, it was under the care of Shelomoth and his brothers.

Now all the acts of David, first and last, are recorded in the words of Samuel the seer, and the words of Nathan the prophet, and the words of Gad the seer;