Daniel 7:3 (a) These beasts represent four great kingdoms, all of them cruel, evil and Satanic in their power and influence. They caused great sorrow and desolation in the earth. These four kingdoms were the Babylonian, Medo-Persian, Grecian under Alexander the Great, and the Roman Empire.
1 Corinthians 15:32 (a) The word is used here by the servant of GOD to indicate the character of the men who opposed Paul and persecuted him in Ephesus. We often use the term "beast" to describe men who are unusually cruel, fierce and heartless.
Titus 1:12 (a) Paul used the word "beast" to describe selfish men who lived for their own comfort and pleasure and oppressed others in order to obtain what they wanted for themselves.
2 Peter 2:12 (b) The animal here is typical of ungodly men who live lustful, fleshly lives. They are not interested in cultivating the refining, ennobling things of life, but seek to gratify the lusts of the flesh.