We found 3 dictionaries that define the word back fill:

General (2 matching dictionaries)

1. back-fill: Wordnik
2. back-fill: Wiktionary

Tech (1 matching dictionary)

3. back fill: Construction deterioration & building durability glossary

Phrases: back and fill, to back and fill, more... ▸ Words similar to back fill ▸ Usage examples for back fill ▸ Idioms related to back fill ▸ Wikipedia articles (New!) ▸ Words that often appear near back fill ▸ Rhymes of back fill ▸ Invented words related to back fill