Feminine passive participle of malak; something ruled, i.e. A realm -- kingsom, king's, X royal.
see HEBREW malak
H4410. melukah
מְלוּכָה noun feminine kingship, royalty; — ׳מ absolute 1 Samuel 10:16 23t.; — kingship, kingly office, royalty: 10:16, 25; 11:14; 18:5; 1 Kings 2:15 (twice in verse); 2:22; 11:35; 1 Chronicles 10:14; Isaiah 34:12; belonging to ׳י Obadiah 21; Psalm 22:29 ("" בַּגּוֺיִם וּמשֵׁל); מ ׳לָכַד עַל 1 Samuel 14:47 assume sovereignty over; מ ׳נָתַן בְּיַד 2 Samuel 16:18 give kingship to (subject ׳י); מ ׳הֵשִׁיב ׳ל 1 Kings 12:21 restore kingship to; מ ׳עָשָׂה על 21:7 exercise kingship over; metaphor of Jerusalem לִמְלוּכָה וַתִּצְלְחִי Ezekiel 16:13 (strike out ᵐ5 Co); הַמ ׳עִיר 2 Samuel 12:26 = royal city; compare הַמ ׳כִּסֵּא 1 Kings 1:46; הַמ ׳זֶרַע 2 Kings 25:25 so Jeremiah 41:1; Ezekiel 17:13; Daniel 1:3; מ ׳צְנִו֯ף Isaiah 62:3 ("" תִּפְאֶרֶת עֲטֶרֶת).