to make a space in something solid by removing the inside part of it
Hollow out the tomatoes and stuff them with the rice mixture.
phrasehollow out hollow sth out • hollow out sth to make a hole or empty space in something by removing the inside part: Cut the top off of a large pineapple and carefully hollow out the fruit.Hollow the mushrooms out with a spoon to make space for the stuffing.hollowed-outadj having a hole or space in the middle, made by removing the inside part: a hollowed-out log
hollow out
To remove something from the inside of something else, often by scraping or scooping. A noun or pronoun can be used between "hollow" and "out." We need to hollow the pumpkin out before we can carve a face on it.
hollow something out
to make the inside of something hollow. Martha hollowed the book out and put her money inside.She hollowed out a book.