be certain that (something will happen or is the case)
be certain that (something will happen or is the case)
To be absolutely sure or know definitively that something will happen or is the case. A: "Are you certain that Michael's coming?" B: "Yes, he called me this morning to confirm the time." I'm certain that the stove is off—I double-checked it myself.
See also: certain, happen, that, will
Farlex Dictionary of Idioms.
- be certain
- be certain of (something)
- you can bet the farm that (something will happen or is the case)
- rule in
- the real McCoy
- real McCoy
- real McCoy, the
- look for (someone or something) high and low
- look for high and low
- proof positive