This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. To weigh more than.

v. To be more significant than; exceed in value or importance: The benefits outweigh the risks.

v. To exceed in weight or mass.

v. To exceed in importance or value.

v. To exceed in weight or value.

To exceed in weight; weigh more or be heavier than; turn the scale against; overweigh; overbalance; surpass in gravity or importance.

To be too great a burden or task for; over-task.

v. weigh more heavily

v. be heavier than

"Once pregnancy has progressed into the second trimester and once children reach puberty, the dangers of food poisoning and foodborne illnesses may again outweigh the mutagenic risks associated with phytochemicals (Flaxman and Sherman in press)."

outweighed    outweighing    outweighs   

rule    reign    prevail    dominate    predominate    surpass    outmatch    outstrip    outgo    outdo   

outbalance    overbalance    overweigh    outpoise    overpoise    downweigh