To restore to its original splendor/ to return something to its pristine (former) glory
Restore the glory that was in the past. Restore the value by returning to being (crown means crown).
("Why was the name of the people called the Synod of Greatness - who restored a crown to its former glory" - Yoma Seth 6:2, and also: "This new method, which the later ones have adopted, is of great benefit, in that it restores the crown of learning to its former glory" - Berdichevski/Kitavhim, 2, 34, and also: "The Midrash tried to seize all the copies The peace and beauty that are in them...if the matter is done according to its correctness and with the caution of the vision, sometimes there is a sense of 'returning a crown to its former glory' - H.N. Bialik in the introduction to 'The Book of the Haggadah')
Translation
Expression (Hebrew)
הֶחֱזִיר עֲטָרָה לְיָשְׁנָהּ
Definition (Hebrew)
הֶחְזִיר אֶת הַכָּבוֹד שֶׁהָיָה בֶּעָבָר. הֵשִׁיב אֶת הַהַעֲרָכָה בַּחֲזָרָה לַהֹוֶה (עֲטָרָה מַשְׁמָע כֶּתֶר).
("לָמָּה נִקְרָא שְׁמָן אַנְשֵׁי כְּנֶסֶת הַגְּדוֹלָה- שֶׁהֶחֱזִירוּ עֲטָרָה לְיָשְׁנָהּ"- יוֹמָא סֵט ע"ב, וְכֵן:"הַדֶּרֶךְ הֶחָדָשׁ הַזֶּה אֲשֶׁר כָּלְלוּ הָאַחֲרוֹנִים, הוּא מוֹעִיל הַרְבֵּה, בַּאֲשֶׁר מַחֲזִיר עֲטֶרֶת הַלִּמּוּד לְיָשְׁנָהּ"-בֶּרְדִּיצֶ'בְסְקִי/ כְּתָבִים, ב, 34, וְכֵן:"הִשְׁתַּדְּלוּ הַמִּסְדָּרִים לִתְפֹּס מִכָּל הַנֻּסְחָאוֹת אֶת הַשָּׁלֵם וְהַיָּפֶה שֶׁבָּהֶן...אִם הַדָּבָר נַעֲשָׂה כְּתִקּוּנוֹ וּבִזְהִירוּת הָרְאוּיָה, פְּעָמִים שֶׁיֵּשׁ בָּזֶה מִשּׁוּם 'הַחְזָרַת עֲטָרָה לְיָשְׁנָהּ"- ח.נ. בְּיָאלִיק בַּהַקְדָּמָה לְ'סֵפֶר הָאַגָּדָה')