significant

a. [ L. significans, -antis, p. pr. of significare. See Signify. ] 1. Fitted or designed to signify or make known something having a meaning; standing as a sign or token; expressive or suggestive; as, a significant word or sound; a significant look. [ 1913 Webster ]

It was well said of Plotinus, that the stars were significant, but not efficient. Sir W. Raleigh. [ 1913 Webster ]

2. Deserving to be considered; important; momentous; as, a significant event. [ 1913 Webster ]

Significant figures (Arith.), the figures which remain to any number, or decimal fraction, after the ciphers at the right or left are canceled. Thus, the significant figures of 25, 000, or of .0025, are 25. [ 1913 Webster ]

n. That which has significance; a sign; a token; a symbol. Wordsworth. [ 1913 Webster ]

In dumb significants proclaim your thoughts. Shak. [ 1913 Webster ]