We found 4 dictionaries that define the word high-def:

General (3 matching dictionaries)

1. high-def: Merriam-Webster
2. High-Def, High-def, high-def: Wordnik
3. high-def: Wiktionary

Slang (1 matching dictionary)

4. High-def: Urban Dictionary

Definitions from Wiktionary (High-def) ▸ adjective:  Abbreviation of high-definition. ▸ Words similar to high-def ▸ Usage examples for high-def ▸ Idioms related to high-def ▸ Wikipedia articles (New!) ▸ Popular nouns described by high-def ▸ Words that often appear near high-def ▸ Rhymes of high-def ▸ Invented words related to high-def