transitive verb stratified -·fied′, stratifying -·fy′·ing

1. to form or arrange in layers or strata
2. to preserve (seeds) by placing them between layers of moisture-retaining soil, peat moss, etc.
3. to classify or separate (people) into groups graded according to status as variously determined by birth, income, education, etc.

Etymology: Fr stratifier < ModL stratificare < L stratum, layer + facere, to make: see stratum & do

intransitive verb