What is "chardal"

Chardal (or Hardal; Hebrew: חרד"ל, acronym for חרדי לאומי, Charedi Le-umi, lit. "Nationalist Charedi", plural Chardalim) usually refers to the portion of the Religious Zionist Jewish community in Israel which inclines significantly toward Charedi ideology (whether in terms of outlook on the secular world, or is their stringent (machmir) approach to Halacha); however it is sometimes used to refer to the portion of the Charedi Jewish community in Israel which inclines significantly toward Religious Zionist ideology.