Coherence is from Latin cohaerere = stick together, to be connected with). See:

• Coherence (physics). Coherence is an attribute of physical quantities that can be described in terms of waves when a well_defined wavefront can be defined, as in classical optics.
• Coherence (linguistics). In linguistics, coherence is what makes a text semantically meaningful.
• Cache coherence and more general, memory coherence are concepts in computer architecture.
• Coherence (philosophical gambling strategy)
• Coherentism is an epistemological theory.
• Coherent (operating_system). A UNIX clone operating system.
• Coherence (mathematics)
• Coherence (Bayesian statistics). In Bayesian decision theory, an inference system of probabilities and utilities is coherent if it is immune to the possibility of a "Dutch book paradox"; see coherence (philosophical gambling strategy).