Definition - the byproduct of having little bodyfat %.
Size - the act of increasing muscular hypertrophy through increased calories and linear increase in stimulus.
I wouldn't split if I were you. I'd switch to an upper/lower split (it's more full body) and perform each movement at a 2X/week frequency. You'll want a horizontal press, horizontal pull, vertical pull, vertical press, squat variation, deadlift variation, clean variation. As accessory, I would recommend incline presses, weighted dips, front squats, db curls.