the appearance or semblance of truth; likelihood; probability: The play lacked verisimilitude. something, as an assertion, having merely the appearance of truth.
The contribution limits apply to each individual, so married couples may be able to contribute the contribution limit for both spouses. For example, in 2017, a married couple, both of whom are over age 50, may contribute a total of $13,000 ($6,500 each, if there is enough earned income to support this level of contribution). Note: You may continue to fund your IRA for 2016 through April 18, 2017.
The $181,000 represents the maximum modified adjusted gross income a married couple filing jointly in 2014 can have and still contribute the full $5,500 to a Roth IRA (or $6,500 if 50 or older anytime during 2014). The ability to contribute money to a Roth disappears entirely if your joint income is $191,000 or more.