To live a long life, try to get in some exercise on most days of the week, which will keep your body strong and healthy for longer. 12. to practice, represent, or exhibit in one's life: to live one's philosophy. 1 : made to last a long time long-life batteries. Long live definition is - —used to express the wish that someone will live for many years. How to use long live in a sentence. You should also try to eat a healthy, balanced diet and drink plenty of water every day so your body is operating efficiently. 2 British : having a substance added that allows something to remain fresh or good for a long time long-life milk. long-life - (of perishable goods) treated to stay fresh longer than usual; "long-life milk" long - primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified; "a long life"; "a long boring speech"; "a long time"; "a long friendship"; "a long game"; "long ago"; "an hour long" —used to express the wish that someone will live for many years… Definition of long-life. 14. live in (or out), to reside at (or away from) the place of one's employment, esp. There’s No Limit to How Long People Can Live, Researchers Say Scientists refute previous research that concluded humans can only live to a maximum of about 115 years. to be forgotten or forgiven through one's subsequent blameless behavior. READ MORE as a domestic servant. 13. live down, to cause (a mistake, disgrace, etc.)