The adj immoral has 5 senses (first 2 from tagged texts)
1. (2) immoral -- (deliberately violating accepted principles of right and wrong)
2. (2) base, dishonorable, dishonourable, immoral, unethical -- (not adhering to ethical or moral principles; "base and unpatriotic motives"; "a base, degrading way of life"; "cheating is dishonorable"; "they considered colonialism immoral"; "unethical practices in handling public funds")
4. bad, immoral -- (characterized by wickedness or immorality; "led a very bad life")
5. depraved, immoral, perverse, perverted, reprobate -- (marked by immorality; deviating from what is considered right or proper or good; "depraved criminals"; "a perverted sense of loyalty"; "the reprobate conduct of a gambling aristocrat")