Chiefly

adv.	1.	In the first place; principally; preëminently; above; especially. Search through this garden; leave unsearched no nook; But chiefly where those two fair creatures lodge. - Milton.
	2.	For the most part; mostly. Those parts of the kingdom where the . . . estates of the dissenters chiefly lay. - Swift.

Adv.

1.

chiefly - for the most part; "he is mainly interested in butterflies" Synonyms: in the main, mainly, primarily, principally

a fortiori, ab initio, ab ovo, aborigine, above all, all in all, all the more, all things considered, almost entirely, altogether, approximately, as a rule, as a whole, as an approximation, as per usual, as things go, as usual, at first, at large, at the start, before everything, broadly, broadly speaking, by and large, commonly, customarily, dominantly, effectually, essentially, even, ever so, first, first and foremost, first of all, first thing, firstly, from the beginning, generally, generally speaking, habitually, in chief, in general, in particular, in the beginning, in the main, indeed, initially, largely, more than ever, most often, mostly, naturally, never so, no end, normally, normatively, on balance, on the whole, ordinarily, originally, overall, particularly, peculiarly, predominantly, prescriptively, prevailingly, primarily, primo, principally, regularly, roughly, roughly speaking, routinely, speaking generally, still more, substantially, to be expected, usually, virtually, yea