Harpoon dream meaning is explained below using 1 different source. Each interpretation is shown with its source.

Interpretation 1 — Stearn Robinson - Tom Corbett

A dream of a harpoon ‘being used on a large fish or a whale predicts an improvement in living conditions and an increase in income; but to be injured by a harpoon or see it go astray is a warning of serious financial distress; don’t overextend your credit
Source: The Complete Guide to Interpreting Your Dreams Author: Stearn Robinson - Tom Corbett