From BiblePortal Wikipedia

Wilson's Dictionary of Bible Types [1]

 Isaiah 30:20 (b) This expression represents the sorrows on which GOD's people will feed when they turn their backs on their Lord and become disobedient. They will feed on their difficulties and pains. They will meditate on them, talk about them, and grieve over them as though they were something to be treasured and sought after. This thought will be further developed under the word "ASHES."

King James Dictionary [2]

ADVERS'ITY, n. An event, or series of events, which oppose success or desire misfortune calamity affliction distress state of unhappiness.

In the day of adversity, consider.  Ecclesiastes 7 .

Ye have rejected God, who saved you out of all you adversities.  1 Samuel 10 .

Charles Buck Theological Dictionary [3]

A state which is opposite to our wishes, and the cause of sorrow. It stands opposed to prosperity.

See Affliction

Vine's Expository Dictionary of NT Words [4]

 Hebrews 13:3Suffer

Webster's Dictionary [5]

(n.) Opposition; contrariety.

International Standard Bible Encyclopedia [6]

ad - vûr´si - ti  : In the Revised Version (British and American) exclusively an Old Testament term, expressing the various forms of distress and evil conveyed by four Hebrew words: צלע , cela‛ , "a halting" or "fall"; צרה , cārāh , "straits" "distress," "affliction"; צר , car , "straitness," "affliction"; רע , ra ), "bad," "evil," "harmful." These words cover the whole range of misfortunes caused by enemies, poverty, sorrow and trouble. "Adversity," which occurs once in the King James Version in New Testament ( Hebrews 13:3 : κακουχούμενος , kakouchoúmenos , "ill-treated") is displaced in the Revised Version (British and American) by the literal rendering which illustrates or interprets a common phase of adversity.