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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151. Today's methods of birth control make it possible for a couple to choose whether or not to have a child.
152. I'll call the factory to check whether the beds can be delivered today.
153. I'm wondering whether this really is a genuine Rolex. Do you think I've been sold a pup?
154. I didn't know whether his story was true or not, but I decided to give him the benefit of the doubt.
155. You can ask a dealer for a discount whether you pay cash or buy on credit.
156. It is questionable whether this is a good way of solving the problem.
157. Whether we like a particular piece of news or not, all we have to do is sit in front of the tube and 'let it happen'.
158. It was touch-and-go whether the doctor would get there on time.
159. We shall not know whether the experiment has been successful until we have received a radio message.
160. They haven't decided whether they will go to London or Berlin.
161. It is essential for us to try to decide whether television is a blessing or a curse.
162. We had a brief debate about whether or not to accept the offer.
163. Whether he deserves what has happened to him is open to debate / a matter for debate .
164. In the dim half-light of evening, I was unable to tell whether it was Mary or her sister.
165. If you sign a document, it is wholly immaterial whether you have read it carefully or not.
166. It's a moot point whether building more roads reduces traffic congestion.
167. The boss never cared whether a worker should live or die.
168. She asked me whether I was interested in working for her.
169. The question arose as to whether this behaviour was unlawful.
170. Whether or not this is useful is a matter of opinion .
171. And whether they play in smoky cellar clubs or spacious concert hall, jazz musicians are drawing record crowds.
172. Have the house surveyed before you decide whether to buy it.
173. I wasn't sure whether to laugh or to reciprocate with a remark of my own.
174. He has got to hear it from the horse's mouth. Then he can make a judgment as to whether his policy is correct or not.
174. Wish you can benefit from our online sentence dictionary and make progress day by day!
175. Karen couldn't make up her mind whether to apply for membership or not.
176. The decision has not yet been made whether to tunnel under the river or build a bridge over it.
177. I can't decide whether to accept the Cambridge or the London job, but in either event I'll have to move house.
178. It's still too soon to say whether the operation was a success.
179. It's not merely a matter of cost, but whether she's old enough to go on holiday alone.
180. It wasn't entirely clear whether she wanted us to help.
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.