The English language is full of words that mean two opposing definitions at the same time. These words are called contronyms.
From a list of 75 that I found online; read and behold the paradox of the contronym:
1. Apology: A statement of contrition for an action, or a defense of one
2. Aught: All, or nothing
3. Bill: A payment, or an invoice for payment
4. Bolt: To secure, or to flee
5. Bound: Heading to a destination, or restrained from movement
6. Buckle: To connect, or to break or collapse
7. Cleave: To adhere, or to separate
8. Clip: To fasten, or detach
9. Consult: To offer advice, or to obtain it
10. Continue: To keep doing an action, or to suspend an action
11. Custom: A common practice, or a special treatment
12. Dike: A wall to prevent flooding, or a ditch
13. Discursive: Moving in an orderly fashion among topics, or proceeding aimlessly in a discussion
14. Dollop: A large amount (British English), or a small amount
15. Dust: To add fine particles, or to remove them
16. Enjoin: To impose, or to prohibit
17. Fast: Quick, or stuck or made stable
18. Fine: Excellent, or acceptable or good enough
19. Finished: Completed, or ended or destroyed
20. First degree: Most severe in the case of a murder charge, or least severe in reference to a burn
21. Fix: To repair, or to castrate
22. Flog: To promote persistently, or to criticize or beat
23. Garnish: To furnish, as with food preparation, or to take away, as with wages
24. Give out: To provide, or to stop because of a lack of supply
25. Go: To proceed or succeed, or to weaken or fail