IPCC   Ari Halperin's view of LSM* definition   US Dept of Defense

Climate change refers to a change in the state of the climate that can be identified (e.g., by using statistical tests) by changes in the mean and/or the variability of its properties, and that persists for an extended period, typically decades or longer. Climate change may be due to natural internal processes or external forcings such as modulations of the solar cycles, volcanic eruptions and persistent anthropogenic changes in the composition of the atmosphere or in land use.

(Source: IPCC AR5 WG1 Glossary)

 

An apocalyptic event, some combination of hellfire and the Biblical Great Flood.

(Source:WUWT)

*LSM = "leftstream media" = mainstream media

 

Variations in average weather conditions that persist over multiple decades or longer that encompass increases and decreases in temperature, shifts in precipitation, and changing risk of certain types of severe weather events.

(Source:DOD DIRECTIVE 4715.21)