to crown it all

: a reward of victory or mark of honor

: a royal or imperial headdress or cap of sovereignty : diadem

: the highest part: such as

: to place a crown or wreath on the head of

: to recognize officially as

: to award a championship to

: the whole amount, quantity, or extent of

: as much as possible

: every member or individual component of

: wholly, quite

: selected as the best (as at a sport) within an area or organization

: only, exclusively

: the whole number, quantity, or amount : totality

used in such phrases as for all I know, for all I care, and for all the good it does to indicate a lack of knowledge, interest, or effectiveness

: everybody, everything

: the whole of one's possessions, resources, or energy

: other : different : atypical

: isomeric form or variety of (a specified chemical compound)

: being one of a group whose members together constitute a structural unit especially of a language