Three of a kind, also known as Trips, or a Set are three cards of the same rank. For example three 5's or three 8's or three Kings etc.
No, in poker, three of a kind beats a straight.
No, in poker, a three of a kind beats a flush.
No, in poker, a three of a kind beats a straight.
Yes, in poker, a straight beats a three of a kind.
Yes, in poker, a straight beats a three of a kind.
Yes, in poker, a three of a kind beats a straight.
No, in poker, 3 of a kind beats 2 pairs.
No, in poker, three of a kind beats two pairs.
No, in poker, four of a kind beats a full house.
No, a full house beats a three of a kind in poker.
No, in poker, a three of a kind beats a two pair.
No, in poker, three of a kind beats two pair.