
1) Being ten more than twenty 2) Cardinal 3) Days in April 4) End of story, to a journalist 5) Half-hour mark 6) June number 7) Market-crash year 8) Minimum age for a Senator 9) Minimum age for a US senator 10) Number 11) Number of beers in a big box 12) Numbers in some months 13) Old, to some teens
Found on
https://www.crosswordclues.com/clue/thirty

1) Xxx
Found on
https://www.crosswordclues.com/clue/thirty

• (n.) The sum of three tens, or twenty and ten; thirty units or objects. • (n.) A symbol expressing thirty, as 30, or XXX. • (a.) Being three times ten; consisting of one more than twenty-nine; twenty and ten; as, the month of June consists of thirty days.
Found on
http://thinkexist.com/dictionary/meaning/thirty/
Thir'ty adjective [ Middle English
thritty , Anglo-Saxon
þrītig ,
þrittig ; akin to Dutch
dertig , German
dreissig , Icelandic
þrjātīu ,
þrjātigi ,
þrir teger , Goth.
þreis tig...Found on
http://www.encyclo.co.uk/webster/T/46
Thir'ty noun ;
plural Thirties 1. The sum of three tens, or twenty and ten; thirty units or objects.
2. A symbol expressing thirty, as 30, or XXX.
Found on
http://www.encyclo.co.uk/webster/T/46

A numeral indicating the conclusion of a take of copy. (courtesy of John E McIntyre)
Found on
http://www.journalism.co.uk/terms-definitions-dictionary-terminology-words/

Thirty is journalism slang for the end.
Found on
http://www.probertencyclopaedia.com/browse/ZT.HTM

[
adj] - being ten more than twenty 2. [n] - the cardinal number that is the product of ten and three
Found on
http://www.webdictionary.co.uk/definition.php?query=thirty
30 adjective being ten more than twenty
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.