KEEP UP

{v.} 1a. To go on; not stop; continue. * /The rain kept up for two days and the roads were flooded./ Compare: KEEP ON. 1b. To go on with (something); continue steadily; never stop. * /Mrs. Smith told John to keep up the good work./ * /The teacher asked Dick to stop bothering Mary, but he kept it up./ Compare: KEEP AT. 2a. To go at the same rate as others. * /John had to work hard to keep up./ * /Billy was the youngest boy on the hike, but he kept up with the others./ Compare: CATCH UP, KEEP PACE. Contrast: FALL BEHIND, GET BEHIND(1). 2b. To keep (something) at the same level or rate or in good condition. * /The shortage of tomatoes kept the prices up./ * /Grandfather was too poor to keep up his house./ 3. To keep informed. - Usually used with "on" or "with". * /Mary is interested in politics and always keeps up with the news./ Compare: KEEP TRACK.