Search Result for "two-tier bid":
Wordnet 3.0

NOUN (1)

1. a takeover bid where the acquirer offers to pay more for the shares needed to gain control than for the remaining shares; 



WordNet (r) 3.0 (2006):

two-tier bid
    n 1: a takeover bid where the acquirer offers to pay more for
         the shares needed to gain control than for the remaining
         shares