keep up (with (someone/something))

1. to stay level or equal with someone or something.

I'm too old or too tired and I just can't keep up.

The little boy tried very hard to keep up with his older brother's accomplishments.

2. to move as quickly as someone else.

I have short legs, and I almost had to run to keep up.

• in question
• inquire into
• inquire into something
• in reality
• in reduced circumstances
• in reference to
• in reference to something
• in relation to
• in relation to something
• in reserve
• in retrospect
• in return
• in return for
• in return for something
• in right mind
• in safe hands
• ins and outs
• ins and outs of
• ins and outs of something
• in season
• in shadow
• in shoes
• in short
• in short order
• in short supply