Synonym: definite, particular, positive, some, special, sure. Antonym: doubtful, uncertain. Similar words: for certain, certainly, uncertain, uncertainty, certainly not, entertainment, curtain, maintain. Meaning: ['sɜːtn] 
adj. 1. definite but not specified or identified 2. having or feeling no doubt or uncertainty; confident and assured 3. established beyond doubt or question; definitely known 4. certain to occur; destined or inevitable 5. established irrevocably 6. reliable in operation or effect 7. exercising or taking care great enough to bring assurance.
adj. 1. definite but not specified or identified 2. having or feeling no doubt or uncertainty; confident and assured 3. established beyond doubt or question; definitely known 4. certain to occur; destined or inevitable 5. established irrevocably 6. reliable in operation or effect 7. exercising or taking care great enough to bring assurance. 
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151. Over the years he's demonstrated a certain prescience in foreign affairs.
152. His reputation lends a certain validity to the approach that it might not deserve.
153. The theory is that there was a rare conjunction of certain bright planets that created the image of the so-called 'Star of Bethlehem'.
154. Leaflets have been air dropped telling people to leave certain areas.
155. The Constitution is not morally neutral but is based on certain central values.
156. We have certain reasons for our decision, which have to remain confidential.
157. She was appointed over the objections of certain members of the board.
158. In your remarks you alluded to a certain sinister design.
159. People who smoke cannot travel in certain parts of the train.
160. Certain words are vulgar and not acceptable in polite society.
161. The bar's lay-out has been cleverly designed to give a feeling of space without losing a certain cosiness.
162. There was a certain coldness in her attitude towards me.
163. This helps to explain the unfortunate experience of a certain agriculturist from the U.S. assigned to duty in another country.
164. This sort of attitude exists among certain groups of people.
165. If the government does not yield,[http://sentencedict.com/certain.html] it should face sufficient military force to ensure its certain and swift defeat.
166. As things stand at present, he seems certain to win.
167. In Jungian theory, there are certain archetypes of human personality.
168. If the money remains unclaimed for a certain time it is returned to the finder.
169. She was a real star. She had a certain spark-that something extra.
170. It's by no means certain that she'll get the job.
171. The investigation into the air crash would inevitably apportion blame to certain members of the crew.
172. Certain grammatical rules must be followed when describing a conversation in reported speech.
173. Taking long-term courses of certain medicines may increase vulnerability to infection.
174. If you want to be slim,(sentencedict.com) you should try to lose a certain amount of weight every week.
175. The effects of the sun can be significantly reduced if we follow certain guidelines.
176. I like modern art to a certain extent/degree, but I don't like the really experimental stuff.
177. There are certain to be more job losses further down the road.
178. There are certain ethical principles that are basic to all the great religions.
179. He had to be certain. There could be no room for doubt.
180. You expect a certain amount of criticism, but you have to rise above it.
More similar words: for certain, certainly, uncertain, uncertainty, certainly not, entertainment, curtain, maintain, concert, undertake, retain, obtain, contain, sustain, captain, container, retaining, sustainable, cancer, soccer, dancer, officer, concern, grocery, producer, ceremony, shortage, stair, mortality, important.