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in the PONS Dictionary

I. constant [ˈkɒnstənt, Am ˈkɑ:n-] N a. mat, PHYS

constant

II. constant [ˈkɒnstənt, Am ˈkɑ:n-] ADJ

1. constant (continuous):

constant
constant noise
constant surveillance

2. constant (unchanging):

constant
constant love
constant friend
constant temperature

3. constant (frequent):

constant
constant use
to be in constant trouble