Sub DefinitionsTabulator()
  Dim aRng As Range, aTbl As Table, aPara As Paragraph, aCell As Cell
  Set aRng = ActiveDocument.Range

  For Each aPara In aRng.Paragraphs
    aPara.Range.Words.Last.Font.Reset     'remove bold from paragraph marks and autonumbers
  Next aPara

  With aRng.Find
    .ClearFormatting
    .Replacement.ClearFormatting
    .Text = "[:;, ^t]{1,5}means[:;, ]{1,5}"
    .Replacement.Text = "^t"
    .Forward = True
    .Wrap = wdFindContinue
    .Format = False
    .MatchCase = False
    .MatchWholeWord = False
    .MatchAllWordForms = False
    .MatchSoundsLike = False
    .MatchWildcards = True
    .Execute Replace:=wdReplaceAll
    
    .Text = "[ :]{1,5}^13"
    .Replacement.Text = ":^p"
    .Execute Replace:=wdReplaceAll
    
    Set aRng = ActiveDocument.Range
    aRng.ListFormat.ConvertNumbersToText
    
    .Text = "^13([a-z])\)"
    .Replacement.Text = "^13(\1)"
    .Execute Replace:=wdReplaceAll
    
    .Text = "^13(?)"
    .Replacement.Text = "|\1"
    .MatchWildcards = True
    .Font.Bold = False
    .Execute Replace:=wdReplaceAll
    
    .Text = "(?)^t"
    .Replacement.Text = "\1zzTabzz"
    .Font.Bold = False
    .Execute Replace:=wdReplaceAll
  End With
  
  Set aRng = ActiveDocument.Range
  Set aTbl = aRng.ConvertToTable(Separator:=wdSeparateByTabs, NumColumns:=2, AutoFitBehavior:=wdAutoFitFixed)
  With aTbl
    .Style = "Table Grid Light"     'choose a table style that matches your preferred table look
    .ApplyStyleHeadingRows = False
    .ApplyStyleLastRow = False
    .ApplyStyleFirstColumn = True     'make sure the table style has a bold first column
    .ApplyStyleLastColumn = False
    .Range.Style = wdStyleNormal
    For Each aCell In .Columns(1).Cells
      If aCell.Range.Characters.First = "[" Then
        aCell.Range.Characters.First.InsertAfter Text:=""""
        aCell.Range.Characters.Last.InsertBefore Text:=""""
      Else
        aCell.Range.Characters.First.InsertBefore Text:=""""
        aCell.Range.Characters.Last.InsertBefore Text:=""""
      End If
    Next aCell
  End With
  
  'Reinstate the tabs and paragraphs
  With aRng.Find
    .ClearFormatting
    .Replacement.ClearFormatting
    .MatchWildcards = False
    .Text = "|"
    .Replacement.Text = "^p"
    .Execute Replace:=wdReplaceAll
    
    .Text = "zzTabzz"
    .Replacement.Text = "^t"      'or a space if you prefer
    .Execute Replace:=wdReplaceAll
  End With
End Sub