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Also, keep up with . Proceed at the same pace, continue alongside another, as in We try to keep up with the times . [First half of 1600s] This usage, also put as keep pace , appears in the phrase keeping up with the Joneses , which was coined in 1913 by cartoonist Arthur R. Momand for the title of a series in the New York Globe . It means “trying to match the lifestyle of one's more affluent neighbors or acquaintances.” For example, Their buying a new van is just another attempt to keep up with the Joneses .

Support, sustain, as in They're trying to keep up their spirits while they wait for news of the crash . [Late 1600s] Also see keep one's chin up .

Maintain in good condition, as in Joan really kept up the property . [Mid-1500s] This usage also appears in the idiom keep up appearances , meaning “to maintain a good front, make things look good even if they're not,” as in She was devastated by his bad prognosis but is trying hard to keep up appearances for their children . [Mid-1700s]

Persevere, carry on, prolong, as in Keep up the good work , or How long will this noise keep up? [Early 1500s] Also see keep it up .

Also, keep up with ; keep up on . Stay in touch, remain informed. For example, Ann and I haven't seen each other since college, but we keep up through our annual Christmas letters , or We subscribe to three papers so as to keep up on current events . [c. 1900]

keep someone up . Cause someone to remain out of bed, as in He's keeping up the children beyond their bedtime . [Mid-1700s]