Synonym: elective, voluntary. Antonym: compulsory. Similar words: exceptional, exceptionally, option, adoption, proportional representation, international relations, nationalization, rationalization. Meaning: ['ɑpʃənl /'ɒp-] 
adj. possible but not necessary; left to personal choice.
adj. possible but not necessary; left to personal choice. 
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91. In town, this becomes tiresome and the ￡359 optional power assistance looks a good bet.
92. As soon as a contract becomes legally binding, performance ceases to be optional, thereby curtailing individual autonomy.
93. At the staff restaurant, everything must be available in a hurry with an optional takeaway service.
94. Alternatively, join us for an optional excursion to Vienna Woods, including a trip to the hunting lodge at Mayerling.
95. Whiskers and ears are optional but the squeaky voice is essential!
96. At the same time optional accessories, such as cornices, light pelmets and plinths, could also be changed.
97. Experience is likely to show that this optional page is rarely completed because the extra costs have to be passed on to clients.
98. We have also arranged optional excursions to help you enjoy the best this region can offer.
98. Sentencedict.com is a online sentence dictionary, on which you can find excellent sentences for a large number of words.
99. An optional bow member clips about the pinna.
100. The open-parenthesis is followed by an optional argument list.
101. Optional digit cross-hatching and other solving aids.
102. Optional: ribbon coding machine, folding device.
103. Storage compression is available as an optional feature.
104. I built in another optional feature of M3G.
105. Middle name should be an optional field.
106. This laminator also had an optional reject sheet conveyor.
107. An optional Header element that contains header information.
108. Attendance at the lecture is optional.
109. Equip with optional ABS yarn brake.
110. This optional attribute specifies a list of manager IDs.
111. Flasher is optional in accordance with user,(Sentencedict.com) s requirement.
112. A 4 - speed automatic transmission is optional.
113. Equippen with 40 negative matrix positive matrix, it can be bent steel edge to optional complex shape.
114. Optional polarizing optics are available for applications requiring the suppression of glare from specular surfaces.
115. The update panel control supports optional arguments that are passed along with the asynchronous request for the update panel.
116. As the number of optional parameters increases, the complexity of the overloading increases.
117. Appends the specified element of List ( optional operation ).
118. This is really an optional feature and ClearQuest test management can be deployed successfully without establishing file locations for test motivators.
119. A new optional argument for the addNode command, asExisitingNode, makes it easier to move or recover nodes.
120. In this model, a table consists of an optional caption and number of rows of cells.
More similar words: exceptional, exceptionally, option, adoption, proportional representation, international relations, nationalization, rationalization, multinational corporation, constitutional convention, rational, national, emotional, rationally, fictional, educational, operational, additional, functional, positional, irrational, conditional, rationalize, rationality, irrationally, rationalism, nationalism, promotional, nationalize, vibrational.