Synonym: if, provided. Similar words: at the thought of, when, where, wheat, wherein, whereas, aesthetic, all the time. Meaning: [ˈweðə] 
conj.1. (used to introduce the first of two or more alternatives, and sometimes repeated before the second or later alternative, usually with the correlative or): It matters little whether we go or stay. Whether we go or whether we stay, the result is the same. 2. (used to introduce a single alternative, the other being implied or understood, or some clause or element not involving alternatives): See whether or not she has come. I doubt whether we can do any better. 3. Archaic. (used to introduce a question presenting alternatives, usually with the correlative or). 4. whether or no, under whatever circumstances; regardless: He threatens to go whether or no. pron. Archaic. 5. which or whichever (of two)?.
conj.1. (used to introduce the first of two or more alternatives, and sometimes repeated before the second or later alternative, usually with the correlative or): It matters little whether we go or stay. Whether we go or whether we stay, the result is the same. 2. (used to introduce a single alternative, the other being implied or understood, or some clause or element not involving alternatives): See whether or not she has come. I doubt whether we can do any better. 3. Archaic. (used to introduce a question presenting alternatives, usually with the correlative or). 4. whether or no, under whatever circumstances; regardless: He threatens to go whether or no. pron. Archaic. 5. which or whichever (of two)?. 
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1. He wots not whether he bears the earth, or the earth him. 
2. Every form of addiction is bad, no matter whether the narcotic be alcohol or morphine or idealism.
3. I sometimes wonder whether the greater rule of all is --- to know how to please.
4. A thief is a thief, whether he steals a diamond or a cucumber.
5. The moon is a moon whether it shines or not.
6. Whether we can stay in this situation is debatable.
7. Whether you fail or fly, at least you tried.
8. I doubted whether the story is true.
9. Check whether a fuse has blown.
10. Look whether the postman has been yet.
11. It is arguable whether the rebels will knuckle under.
12. I was in a quandary about whether to go.
13. I wasn't sure whether you'd like it.
14. Ask him whether he can come or not.
15. The world exists, whether you like it or not.
16. Maurice asked me whether I needed any help.
17. I do not care whether it rains or not.
18. I am doubtful whether she is still alive.
19. Put it dissolve into zero, whether not become poison.
20. We don't know whether he's alive or dead.
21. The computer verified that/whether the data was loaded correctly.
22. He seemed undecided whether to go or stay.
23. I'm not sure whether I should tell you this.
24. I'll see whether she's at home .
25. Adam enquired politely whether they had enjoyed the show.
26. Whether the protests will cease remains to be seen.
27. The committee assesses whether a building is worth preserving.
28. We're still dithering over whether to marry.
29. The secret of being miserable is to have leisure to bother about whether you are happy or not.
30. The people may safely be trusted to hear everything true and false, and to form a correct judgment,Were it fall to me to decide whether we should have a government without newspapers of newspapers without a government,[http://sentencedict.com] I should not hesitate a moment to prefer the latter.
More similar words: at the thought of, when, where, wheat, wherein, whereas, aesthetic, all the time, rhetoric, by the time, on the table, even when, elsewhere, at the time of, overwhelm, wheelchair, for the time being, overwhelming, together, go together, see that, method, ethnic, ethics, get hold of, get together, altogether, ethical, nonetheless, together with.