# “Total” degree of a polynomial?

What is the difference between the "degree" of a polynomial and its "total degree"?

$$\deg(x_1^2x_2x_3^4-3x_2+4x_1x_4^5-x_1x_2^3x^2)=7$$
$$\deg_1(x_1^2x_2x_3^4-3x_2+4x_1x_4^5-x_1x_2^3x^2)=2\;,\;\;\deg_4(x_1^2x_2x_3^4-3x_2+4x_1x_4^5-x_1x_2^3x^2)=5\ldots$$