Meditate - Vine's Expository Dictionary of New Testament Words
Meditate[ 1,,G3191, meletao ]
primarily, to care for" (akin to melete, "care;" cp. melei, "it is a care"), denotes
(a) "to attend to, practice," 1 Timothy 4:15, RV, "be diligent in" (AV, "meditate upon"); to practice is the prevalent sense of the word, and the context is not against this significance in the RV rendering; some mss. have it in Mark 13:11;
(b) "to ponder, imagine," Acts 4:25. See IMAGINE.
[ 2,,G4304, promeletao ]
"to premediate," is used in Luke 21:14.
Note: In the corresponding passage in Mark 13:11, the most authentic mss. have the verb promerimnao, "to be anxious beforehand" (RV); See No. 1.