One who understands something.

(circus, acrobatics) One who physically supports a formation of acrobats, as a human pyramid.

plural of understander

(obsolete) simple past tense and past participle of understand

Misspelling of understandable.

The state, quality, or condition of being understandable.

plural of memorandum of understanding

plural of memorandum of understanding

(law) A document that outlines the legal and factual premises believed by the parties to have been agreed to between them.

(slang, obsolete) To be conscious of any trickery; to be alert to one's own interests, to know what's going on.