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1. To collect or assemble certain things. A noun or pronoun can be used between "gather" and "up." Gather up your toys now—it's time for us to leave. I gathered the plates up and brought them into the kitchen.
2. To bunch in a particular place, often as of fabric. If you ironed that shirt, the fabric wouldn't gather up like that.
gather something up
to collect something; to pick something up. Let's gather our things up and go. Please gather up your things.
1. To bring together or collect something that is distributed or scattered: I gathered up my dress and stepped over the puddle. I gathered the papers up and put them in my briefcase.
2. To come together or be more concentrated in one place: The cloth gathers up at the hem of this dress.