A central cohesive source of stability and security; a person or thing that is critical to a system or organisation.
A pin inserted through holes at the end of an axle or shaft, so as to secure a wheel or shaft-mounted device.
To adopt as, or serve as, a central cohesive source of stability and security.
A state of readiness without immediate involvement; remaining in preparation for (a sudden or unforeseen event or situation).
Something that is standard, well-tested, or frequently used.
sleep mode
Waiting at the airport in the hope of getting a seat on a flight that is already booked out.
To wait briefly, as for additional communication by radio or telephone; alternative spelling of stand by