in ‧ cre ‧ men ‧ tal /ˌɪŋkrəˈmentl◂, ˌɪŋkrɪˈmentl◂/ BrE AmE adjective formal
1 . [usually before noun] increasing in amount or value gradually and by a regular amount:
incremental pay scales
2 . happening gradually over time:
Mr Kennedy said that progress on reforms would be incremental.
a process of incremental change
—incrementally adverb :
You need to make changes in your diet incrementally.