(1) The quality of being significant
"Do not underestimate the significance of nuclear power"
(2) A meaning that is not expressly stated but can be inferred
"The significance of his remark became clear only later"
"The expectation was spread both by word and by implication"
(3) The message that is intended or expressed or signified
"What is the meaning of this sentence"
"The significance of a red traffic light"
"The signification of Chinese characters"
"The import of his announcement was ambiguous"