DICT.TW Dictionary Taiwan

 strat·i·fy /ˈstrætəˌfaɪ/
 (vt.)(使)成層

 Strat·i·fy v. t. [imp. & p. p. Stratified p. pr. & vb. n. Stratifying ]  To form or deposit in strata, or layers, as substances in the earth; to arrange in strata.
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 stratify
      v 1: divide society into social classes or castes; "Income
           distribution often stratifies a society"
      2: form layers or strata; "The rock stratifies"
      3: develop different social levels, classes, or castes;
         "Society stratifies when the income gap widens"
      4: form, arrange, or deposit in layers; "The fish are
         stratified in barrels"; "The rock was stratified by the
         force of the water"; "A statistician stratifies the list
         of names according to the addresses"
      5: render fertile and preserve by placing between layers of
         earth or sand; "stratify seeds"
      [also: stratified]