1. [adj]  concerned with concrete problems or data rather than with fundamental principles; opposed to theoretical; "applied physics"; "applied psychology"; "technical problems in medicine, engineering, economics and other applied disciplines"- Sidney Hook
2. [adj]  put into practice or put to use; "applied physics"
3. [adj]  that are used; "an isotropic resonance shift...to lower applied fields"

APPLIED is a 7 letter word that starts with A.