[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.
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