to be a sign that something will develop badly or well

predictor

a uniformed porter at the entrance to a hotel, large shop etc

person carrying information to another

a sign of what is to follow; a person who prepares for the coming of another person or thing

messenger, herald

to live (and die) before

go ahead of

a person (formerly) making public announcements for, and carrying messages from, a ruler

omen, messenger

to make a person known to another, usually by giving her or his name

make known; present

(of prices) the lowest at which goods are to be sold

make known; present

a person who leads; a business, design, country etc that has first place (in a competition, set of statistics etc)

person who guides

(something, a happening, regarded as) a sign of something good or warning of evil fortune

sign of something to come

to be a sign or warning of (a future event etc)

foreshadow, indicate

an omen

indication, forewarning

to come or go before (another or others) in time, place or order

go ahead of

a person or thing coming before and as a sign of what is to follow

something that indicates outcome or event beforehand

a mark, object, symbol etc used to represent something: 'mathematical sings' such as '+', '-', 'x', '?'; a word or words, design etc on a board or plate to give a warning, or to give direction; to write (one's name) on (a letter, application form etc)

indication, evidence

a strong feeling or reaction

indication, forewarning