To take into the body by the mouth for digestion or absorption. See Synonyms at eat.
To take in and absorb as food: "Marine ciliates ... can be observed ... ingesting other single-celled creatures and harvesting their chloroplasts” ( Carol Kaesuk Yoon).
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.