From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( a.) Pertaining to, resembling, or inhabiting heaven; celestial; not earthly; as, heavenly regions; heavenly music.

(2): ( adv.) In a manner resembling that of heaven.

(3): ( adv.) By the influence or agency of heaven.

(4): ( a.) Appropriate to heaven in character or happiness; perfect; pure; supremely blessed; as, a heavenly race; the heavenly, throng.

King James Dictionary [2]

HEAV'ENLY, a. Pertaining to heaven celestial as heavenly regions heavenly bliss.

1. Resembling heaven supremely excellent as a heavenly lyre a heavenly temper.

The love of heaven makes one heavenly.

2. Inhabiting heaven as a heavenly race the heavenly throng.

International Standard Bible Encyclopedia [3]

hev ´' n - 51 ( οὐράνιος , ouránios , ἐπουράνιος , epouránios ): Pertaining to heaven or the heavens. See Heavens . The phrase tá epouránia , translated "heavenly things" in   John 3:12;  Hebrews 8:5;  Hebrews 9:23 , but in Ephesians "heavenly places" ( John 1:3 ,  John 1:10;  John 2:6;  John 3:10;  John 6:12 ), has shades of meaning defined by the context. In  John 3:12 , in contrast with "earthly things" (i.e. such as can be brought to the test of experience), it denotes truths known only through revelation (God's love in salvation). In Hebrews the sense is local. In Ephesians it denotes the sphere of spiritual privilege in Christ, except in  Ephesians 6:12 , where it stands for the unseen spiritual world, in which both good and evil forces operate. It is always the sphere of the super-earthly.