עַלְמָה, . a) marriageable girl Gn 2443 Ex 28 Ps 6826, as a description of the beloved Song 13 68; b) a girl who is able to be married Pr 3019; c) a young woman (KBL: until the birth of her first child) Is 714 Sept. παρθένος (< Matthew 123), Aq., Symm., Theodotion νεᾶνις —2. עַל־עֲלָמוֹת Ps 461 1C 1520, uncertain meaning: (singing) in the style of young girls, soprano, high-pitched musical instrument), rd. עֲלָמִית; “in the Elamite style”: related to I עלם; cj. Ps 4815 → עַלְמוּת 2.
עלם: MHeb. DSS to be concealed; Arb. ʿalama to signify, ʿalima to know, learn; Ug. ʿlm; Eth. ʿalama to signify
qal: pt. pass. עֲלֻמֵנוּ (MSS Aq., Symm., Jerome, ־מֵינוּ): what is hidden, i.e. hidden sin Ps 908.
hitp: pf. הִתְעַלַּמְתָּ; impf. יִתְעַלֶּם־, תִּתְעַלַּמ/לָֽם; inf. הִתְעַלֵּם: to hide oneself with עַל (= ? אֶל) שֶׁלֶג Jb 616; to hide oneself, meaning to avoid, withdraw with מִן from Dt 221.3f Is 587 Ps 552 cj. Ps 101 → hif, Sir 42 3816. †
Koehler, Baumgartner, Richardson, Stamm, The Hebrew and Aramaic lexicon of the Old Testament.