Resolution: This is the number of possible output levels the DAC is designed to reproduce. This is usually stated as the number of bits it uses, which is the base two logarithm of the number of levels. For instance a 1 bit DAC is designed to reproduce 2 levels while an 8 bit DAC is designed for 256 levels. Resolution is related to the Effective Number of Bits (ENOB) which is a measurement of the actual resolution attained by the DAC.
One LSB is defined as 1LSB = 7V/64.
And discussing data converters, the term resolution describes the smallest change in the analog output with respect to the value of the reference voltage. But it is slightly different from the definition of LSB in that resolution is typically given in terms of bits. So you DAC resolution is 6bits.
You can see it from Jocob Baker's CMOS: Circuit Design, Layout and Simulation