ETYM French certain, from Late Lat. certanus, from Latin certus determined, fixed, certain, orig. p. p. of cernere to perceive, decide, determine.
1. Established beyond doubt or question; definitely known.
2. Definite but not specified or identified.
3. Having or feeling no doubt or uncertainty; confident and assured; SYN. sure.
4. Certain to occur; destined or inevitable; SYN. sure.
5. Exercising or taking care great enough to bring assurance; SYN. sure.
6. Capable of being depended on; SYN. sure.
1. Infallible or unfailing
2. Certain not to fail
3. Physically secure or dependable
4. (Of persons) Worthy of trust or confidence; SYN. trusted.