chiefly

From Middle English chefly; equivalent to chief +‎ -ly.

• (UK) IPA^(key): /ˈtʃiːf.li/

• Audio (US)

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• Rhymes: -iːfli

chiefly (comparative more chiefly, superlative most chiefly)

1. (focus) Especially or primarily; above all.

   Their relationship is chiefly professional.

   This is a term chiefly used by online gamers.

2. (focus) Mainly or principally; almost entirely.

• (above all): first and foremost, particularly; see also Thesaurus:above all
• (almost entirely): by and large, for the most part, largely; see also Thesaurus:mostly

chiefly (comparative chieflier, superlative chiefliest)

1. of or relating to a chief
   • 1890, James George Frazer, The Golden Bough, volume 2, page 261:

     The maintenance of a perpetual fire came to be associated with chiefly or royal dignity.