Synonym: change, deviate, diversify, modify, vary. Antonym: conserve, preserve. Similar words: alternative, filter, shelter, filtering, svelte, health, wealth, penalty. Meaning: ['ɔːltə] 
v. 1. cause to change; make different; cause a transformation 2. make or become different in some particular way, without permanently losing one's or its former characteristics or essence 3. make an alteration to 4. insert words into texts, often falsifying it thereby 5. remove the ovaries of.
v. 1. cause to change; make different; cause a transformation 2. make or become different in some particular way, without permanently losing one's or its former characteristics or essence 3. make an alteration to 4. insert words into texts, often falsifying it thereby 5. remove the ovaries of. 
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(271) It is a poor saying of Epicurus , Satis magnum alter alteri theatrum sumus.
(272) I have to listen the familiar jangling of the loose alter he sll the time carried.
(273) This great flowering of annotating and indexing will alter the way we discover books, too.
(274) What drugs alter prothrombin time by interacting with warfarin levels ( pharmacokinetics )?
(275) To alter ( a legislative measure, for example ) formally by adding, deleting, or rephrasing.