From male'; a fulfilling (only in plural), i.e. (literally) a setting (of gems), or (technically) consecration (also concretely, a dedicatory sacrifice) -- consecration, be set.
see HEBREW male'
H4394. millu
[מִלֻּא מִלּוּא,] noun masculine setting, installation; (compare verb Pi`el Pu`al); — plural מִלֻּאִים (׳מִלּוּ) Exodus 25:7 13t.; מִלֻּאֵיכֶם Leviticus 8:33; —
1 setting, מ ׳אַבְנֵי stones for setting Exodus 25:7; 35:9, 27 compare 1 Chronicles 29:2 (וּמ שֹׁ֫הַם ׳אַבְנֵי).
2 installation (of priests): Leviticus 7:37; 8:33; = installation-offering 8:28 ("" אִשָּׁה) compare הַמּ ׳סַלֿ 8:31; הַמּ ׳אֵיל Exodus 29:22, 26, 27, 31; Leviticus 8:22, 29; הַמ ׳בְּשַׂר Exodus 29:34.