1. [adj]  so adjusted as to be appropriate or brought into harmony; "an industry not attuned to the demands of the market"; "a remark keyed to the situation"; "charges finely tuned to the amount a student can afford"
2. [adj]  (music) brought to correct pitch; "his tuned violin"; "the attuned instruments"
3. [adj]  (music) tuned in equal temperament; or so tuned as to allow modulation into other keys

TUNED is a 5 letter word that starts with T.