Antonym: temporary. Similar words: everlasting, fasting, boasting, forecasting, plastic, sting, stingy, procrastinate. Meaning: ['læstɪŋ /'lɑː-] 
adj. 1. continuing or enduring without marked change in status or condition or place 2. existing for a long time 3. retained; not shed 4. lasting a long time without change.
adj. 1. continuing or enduring without marked change in status or condition or place 2. existing for a long time 3. retained; not shed 4. lasting a long time without change. 
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(241) After a much more painful siege , lasting three months, Malaga fell too.
(242) The only lasting solution lies in a political settlement. Without it, their descent into chaos will be guaranteed.
(243) Urban infrastructure is long - lasting and influences resource needs for decades to come.
More similar words: everlasting, fasting, boasting, forecasting, plastic, sting, stingy, procrastinate, posting, testing, procrastination, existing, investing, devastating, exhausting, stinginess, disgusting, stimulating, distinguish, interesting, distinguished, undistinguished, plaster cast, last, blast, ballast, at last, plaster, last week, last rites.