Brother-in-law dream meaning is explained below using 3 different sources. Each interpretation is shown with its source.

Interpretation 1 — Vincent Wienand

1. Legalistic believer; Gal. 2:16,

2. Religious tradition; Matt. 15:1-3;

3. Religious adversary; Matt. 16:21;

4. Fellow believer imposing their ways Gal. 2:12

Source: Dream Dictionary The Biblical Model Author: Vincent Wienand

Interpretation 2 — Ibn Seerin

Having a brother in-law in a dream and particularly for someone who does not have in-laws means strength, peace and tranquility.
Source: Islamic Dream Interpretation Author: Ibn Seerin

Interpretation 3 — Stearn Robinson - Tom Corbett

The same as for Brother.
Source: The Complete Guide to Interpreting Your Dreams Author: Stearn Robinson - Tom Corbett