'Troth' definitions:

Definition of 'troth'

From: WordNet
noun
A mutual promise to marry [syn: betrothal, troth, engagement]
noun
A solemn pledge of fidelity [syn: plight, troth]

Definition of 'Troth'

From: GCIDE
  • Troth \Troth\, n. [A variant of truth. See Truth.]
  • 1. Belief; faith; fidelity. [1913 Webster]
  • Bid her alight And hertroth plight. --Shak. [1913 Webster]
  • 2. Truth; verity; veracity; as, by my troth. --Shak. [1913 Webster]
  • In troth, thou art able to instruct gray hairs. --Addison. [1913 Webster]
  • 3. Betrothal. [1913 Webster]