v (form of|second-person singular simple present tense|be)
v (form of|first-person plural simple present tense|be)
v (form of|second-person plural simple present tense|be)
v (form of|third-person plural simple present tense|be)
n (rare) An accepted (but deprecated and rarely used) SI unit of area equal to 100 square metres, or a former unit of approximately the same extent. Symbol: 'a'