Definition of: stratify

(strat′ə·fī) v. ·fied, ·fy·ing v.t.
1. To form or arrange in strata.
2. To preserve (seeds) by spreading in alternating layers of earth and sand.
—v.i.
3. To form in strata.
4. To be formed in strata. [<F stratifier <Med. L stratificare <L stratum layer + facere make]
—strat′i·fi·ca′tion noun