• The basic, central, or critical point or feature.
  • A puzzling or apparently insoluble problem.
  • A cross. See phrases below. Specifically
  • The Southern Cross, the most celebrated constellation of the southern heavens.
  • The cross as an instrument of torture; hence, anything that puzzles or vexes in a high degree; a conundrum.
  • Anything that is very puzzling or difficult to explain.
  • The basic, <xref>central</xref>, or <xref>essential</xref> <xref>point</xref> or feature.
  • The <xref>critical</xref> or <xref>transitional</xref> <xref>moment</xref> or <xref>issue</xref>, a <xref>turning point</xref>.
  • A <xref>puzzle</xref> or <xref>difficulty</xref>.
  • The <xref>hardest</xref> <xref>point</xref> of a climb.
  • A <xref>cross</xref> on a <xref>coat of arms</xref>.
  • the most important point
  • a small conspicuous constellation in the southern hemisphere in the Milky Way near Centaurus
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