SIGNIFICANT a.
Deserving to be considered; important; momentous; as, a significant event. 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.
VALUABLE a.
Worthy; estimable; deserving esteem; as, a valuable friend; a valuable companion. Valuable consideration (Law), an equivalent or compensation having value given for a thing purchased, as money, marriage, services, etc. Blackstone. Bouvier.
WORTHLESS a.
Destitute of worth; having no value, virtue, excellence, dignity, or the like; undeserving; valueless; useless; vile; mean; as, a worthless garment; a worthless ship; a worthless man or woman; a worthless magistrate. 'T is a worthless world to win or lose. Byron. -- Worth"less*ly, adv. -- Worth"less*ness, n.…