We found one dictionary that defines the word read-a-thon:

General (1 matching dictionary)

1. read-a-thon, Read-a-Thon, Read-a-thon, Read-A-Thon: Wordnik

▸ Words similar to read-a-thon ▸ Usage examples for read-a-thon ▸ Idioms related to read-a-thon ▸ Wikipedia articles (New!) ▸ Words that often appear near read-a-thon ▸ Rhymes of read-a-thon ▸ Invented words related to read-a-thon