to begin or cause to begin (something or to do something); come or cause to come into being, operation, etc

to make or cause to make a beginning of (a process, series of actions, etc)

to set or be set in motion

to make a sudden involuntary movement of one's body, from or as if from fright; jump

to spring or jump suddenly from a position or place

to establish or be established; set up

to support (someone) in the first part of a venture, career, etc

to work or cause to work loose

to enter or be entered in a race

to flow violently from a source

to rouse (game) from a hiding place, lair, etc

(esp of eyes) to bulge; pop

to commence quarrelling or causing a disturbance

the first or first part of a series of actions or operations, a journey, etc

the place or time of starting, as of a race or performance

a signal to proceed, as in a race

a lead or advantage, either in time or distance and usually of specified extent, in a competitive activity

a slight involuntary movement of the body, as through fright, surprise, etc

an opportunity to enter a career, undertake a project, etc

a surprising incident

a part that has come loose or been disengaged

Strategic Arms Reduction Treaty: a series of agreements between the US and the USSR (and then Russia) to reduce nuclear weapons