The dictionary says "To state or express in a concise word."
I say to say something by using as little brain work as possible.
Long version:
"And like a flower in the moonlight, she glided gracefully down the aisle."
Summarized version:
"Why can't you just said she walked down the aisle?"
Summarizing is to take a sentence and shorten it, but remember to shorten only to the important details so the reader can still understand it. Also the word that your teacher is probably teaching you.
Teacher: You summarize by shortening the sentence and putting the important details.
Kid: Ohspeedrun Teacher: ๐๐๐
Kid: *ASCENDS TO GOD*
Teacher: ๐๐๐๐๐๐๐๐๐
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.