We found 9 dictionaries that define the word ten a penny:

General (5 matching dictionaries)

1. ten a penny: Merriam-Webster
2. ten-a-penny: Wordnik
3. ten a penny: Wiktionary
4. ten a penny: TheFreeDictionary.com

Business (1 matching dictionary)

5. ten a penny: Legal dictionary

Computing (1 matching dictionary)

6. ten a penny: Encyclopedia

Miscellaneous (1 matching dictionary)

7. ten a penny: Idioms

Slang (1 matching dictionary)

8. ten-a-penny, ten a penny: Urban Dictionary

Definitions from Wiktionary (ten a penny) ▸ adjective:  (idiomatic, UK) So common as to be practically worthless. Similar: two a penny, twopenny-halfpenny, twopenny-ha'penny, penny packet, pennied, tuppenny, halfpenny, lickpenny, sixpenny, penny-ante, more... Opposite: rare, unique, scarce, uncommon ▸ Words similar to ten a penny ▸ Usage examples for ten a penny ▸ Idioms related to ten a penny ▸ Wikipedia articles (New!) ▸ Popular nouns described by ten a penny ▸ Words that often appear near ten a penny ▸ Rhymes of ten a penny ▸ Invented words related to ten a penny