Meaning of INSULATION in English

INSULATION

in ‧ su ‧ la ‧ tion /ˌɪnsjəˈleɪʃ ə n, ˌɪnsjʊˈleɪʃ ə n $ ˌɪnsə-/ BrE AmE noun [uncountable]

1 . when something is insulated or someone insulates something:

Good insulation can save you money on heating bills.

2 . material used to insulate something, especially a building:

glass-fibre insulation

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.