gua·ran·tee /ˌgar-ən-'tē, ˌgär-/ n [probably alteration of guaranty]
1: guarantor
2: guaranty (1)
3: an assurance that a condition will be fulfilled: as
a: an agreement by which one person undertakes to secure another in the possession or enjoyment of something
b: an assurance of the quality or of the length of use to be expected from a product offered for sale often with a promise of reimbursement
4: guaranty (4, 5)
constitutional guarantee s
guarantee vt
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.