From BiblePortal Wikipedia

Morrish Bible Dictionary [1]

This is in scripture mostly linked with love and sonship, and implies 'instruction' and 'discipline.' He that loveth chasteneth.  Proverbs 13:24;  Deuteronomy 8:5;  Hebrews 12:5-11;  Revelation 3:19 . "Blessed is the man whom thou chastenest."  Psalm 94:12 . The chastening at the time does not seem to be joyous but grievous, yet afterward it yields the peaceable fruits of righteousness to those exercised thereby.  Hebrews 12:11 .  John 15:2 shows that a Christian may be chastened of the Father that he may bring forth more fruit.

King James Dictionary [2]

Chastening, ppr. Correcting afflicting for correction.

Chastening, n. Correction punishment for the purpose of reclaiming.

No chastening for the present seemeth to be joyous but grievous.  Hebrews 12 .

Webster's Dictionary [3]

(p. pr. & vb. n.) of Chasten